I have converted a couple of MBX5R buggies. I used RC Product Designs' parts for the conversion, except for the battery tray, where I used Tekno. Works fine for me, although the MBX5 cannot compare to the way my converted MBX6 handles (it is also based on RC Product Designs + Tekno tray). Now I am working on a Tekno V4 and a new MBX6, cannot wait for this snowy winter to end