I still need to upgrade this suspension system, but i already am quite happy with it. in rather smooth offroad conditions 300mp/h are easily possible. It tends to self destroy if you take a hard hit though. please leave a comment if you got improvement ideas, or just implement them yourself, upload it and tag me. Following versions may or may not come soon, i've been heavily focusing on making a satisfyingly working suspension these past years, planes and vtols got too boring.

Edit: i always try building rather accessible, so removing the suspension is pretty easy, or justremoving the whole frame. Then you can change length and width of the platform without trouble and keep the main platform for your build.