Spacebuild 3 is an awesome addon for Garry's Mod. I am currently converting a city bus so that it can go to space. I put all of the life support in the back so that it would look cool. Unfortunately all the compressors and tanks weighed like half a ton each and that went over the bus's weight limit and the entire back of the bus is scraping along the ground. I was test driving it to test it to see if it would still drive because I wanted it to drive and fly. I didn't test the suspension because the bus was jacked up in the air so that I could access the bottom of the bus. So then when I unfroze it and tried to drive it I had no idea that the bus was dragging on the ground. I did fit it out with climate control and air exchangers so that people who rode the bus could walk around inside without needing to constantly stop by the suit dispenser to refill. This probably didn't help the suspension deal with the extra weight either. I am planning on finishing it tonight.