My new Inertial Upper Stage Preview

@GSpace Also I am the first one to make an Inertial Upper Stage in SimpleRockets 2. Bubble 89 didn't made the Inertial Upper Stage like in real life but what matters is that I made the Inertial Upper Stage first in SimpleRockets 2.

@GSpace Yes but after I send the post, I'll give them tips to separate the Inertial Upper Stage stages. But I will give you a tip first. Separate then time warp to 10x then take it to normal time quickly then extend the nozzle then ignite the Inertial Upper Stage second stage.

Looks awesome!

It actually has 12 roll thrusters on the first stage.

There is a problem at stage separation so I will do a solution.

The second stage has an Extendable Nozzle.