Suggestion:
I'd love to see a new, specialized part-mirroring tool in the game specifically to assist the player with adding multiple, perfectly-symmetrical, fuel adapter nozzle parts to the bottom of fuel tanks in order to build multi-engine rocket stages far more quickly. So, rather than manually placing an additional fuel adapter nozzle on the bottom of the fuel tank and then radially mirroring it, then cloning the first adapter nozzle and then radially mirroring that to add a second row of symmetrical fuel adapter nozzles and on and on, the new semi-automated multiple fuel adapter nozzle part placement tool would allow the player to edit the part properties of the fuel tank they want to add multiple nozzles and engines to with a new tab/section in the fuel tank properties menu.
This new tab/section would be like the part-mirroring tool, but instead of selecting a single fuel adapter nozzle and mirroring it radially, the player could select the fuel tank they want to automatically add nozzles to, then select from a few preset types of perfectly-symmetrical fuel adapter nozzle placement layout patterns, then type a custom number for the quantity of new fuel adapter nozzle parts to place symmetrically according to that preset pattern and then the tool would solve the math in the back-end and automatically attach multiple fuel adapter nozzle parts to the bottom of the fuel tank in the selected pattern and quantity of nozzles. No manual nozzle spawning and repeated manual placement and tedious manual re-positioning would be necessary. The newly automatically-placed fuel adapter nozzles should be 'firmly' 'welded' onto the fuel tank, so that if the new fuel tank is moved around or detached and reattached to the rest of the rocket, neither the new nozzles nor the engines attached to them would bug out and randomly detach from the fuel tank as they do now. And if the automatically-placed fuel adapter nozzles need to have their part properties customized by the player after the tool placed them, the player could simply click on any one of the new nozzles and open its part properties menu to adjust its parameters, then these new parameters would be automatically adjusted on the rest of the new nozzles attached to that specific fuel tank.
Some example geometric patterns for multiple fuel adapter nozzle placement by the automated tool include multiple concentric rings of symmetrical fuel adapter nozzles on the bottom of a fuel tank, with the number of nozzles per row/ring specified by the player when using the placement tool, as well as the distance between each nozzle, and distance between each row/ring of nozzles. Another preset pattern could be a linear cross, shaped like this: (+) or this: (X) or this: (*), so you could specify the number of lines of nozzles included in the placement pattern, two lines would be a cross, or you could do three, four, or five lines, depending on the number of engines needed to be attached to the fuel tank. Another pattern could be a spiral of fuel adapter nozzles with customizable number of spiral arms (like a galaxy).
Reasons to add this semi-automated, symmetrical, geometric-pattern-based, multiple fuel adapter nozzle placement tool:
I love to build rockets with more than one rocket engine attached to the bottom of large fuel tanks. The only way to add multiple engines to a fuel tank now is to manually add a small fuel adapter nozzle part to the bottom of a fuel tank some distance away from the one solitary default engine-attachment point available in the center of the fuel tank part and then mirror the fuel adapter nozzle radially by some factor to achieve a symmetrical multi-engine layout.
The problem I have right now when adding multiple engines and adapter nozzles to fuel tanks, even on my PC running the game in 4K max settings with a precise laser mouse, the fuel adapter nozzles are so tiny that they become very difficult to move to the proper positions I need them to be in and it's also very difficult to keep them solidly-attached to the bottom of fuel tanks whenever I move or re-size the fuel tank that they're attached to.
Sometimes, seemingly randomly, just one or a few adapter nozzles out of several mirrored rows of multiple nozzles, will lose their attachment to the fuel tank if I even slightly adjust its XYZ position, or detach and adjust the tank capacity and then reattach it to the rest of the rocket in the same stage/position. What makes this worse is that it's impossible to tell if any fuel adapter nozzle or its engine have somehow become detached from the fuel tank after adjusting the fuel tank's size or position in any way. So, on my larger multi-engine-per-stage rocket designs, after spending a large amount of time and effort adding multiple adapter nozzles and engines and then painstakingly make their positions on the bottom of the fuel tank perfectly symmetrical by manually and carefully moving them and mirroring them, I go to test the rocket on the launch pad and then if just one nozzle somehow became detached, the engine will fall off and cause the entire rocket to explode. Sometimes I'm never able to find out which tiny fuel adapter nozzle part became detached and is causing the catastrophic engine-detachment problem and I'm forced to scrap the entire rocket design and start fresh, since upon detailed visual inspection along with using the "re-attach" key on each and every single part of the rocket, one nozzle can still be detached and it's visually impossible to tell which one it is, since the distance it's detached from the fuel tank by can be seemingly less than 1 millimeter or not visually detached at all. The semi-automated fuel adapter nozzle placement tool would solve these problems and drastically reduce the time and effort required by the player to construct each stage of their multi-stage, multi-engine-per-stage rocket designs. It would make building larger, more complex, multi-engine rockets A LOT easier and more fun!
Thanks for reading! :)
@JAMESCorp Hey thanks, much appreciated!