The middle 3 are the easy , the 1st and last wheel , not so much . I just used a sharp Xacto chisel blade to cut the outer wheel and the associated track teeth off . When adding the track/wheel set to the hull , I glued the full track set then added each single wheel in its proper place . My ultimate goal is to one day use all 3 Rubicon wheel types as well as the Warlord T-34 track on one model kit