Being a mechanic myself,working on the wheelchairs is not the problem for me. Parts and pricing are. Good batteries are expensive,i bought mine from napa when they had a 20% off deal going,still cost $450. Wanting to add features is where the problems really surface, like adding recline to my wifes backup that i purchased off ebay, found the cylinder on ebay cheap compared to new,install no problem,try to get numotion to program it for me,ya,sure. Not happening. They definately have you where they want you. Pass that law in california!