Four years ago I built dragster out of LEGO Technic set 42036. I also got idea for another alternative model but I haven't got enough motivation to finish it until now.
Last Friday I twisted my ankle and got leg in plaster. It was inspiration that I needed to finish this wheelchair. I call it "Ultimate Biker's Vehicle" in accordance with this biker's evolution:
If I keep having enough inspiration in upcoming days I will build other vehicles from this evolution.
Building instructions are freely available at buildinst.cz