I had the Exotek Pro-4 and really liked it. But certain critical parts are nearly impossible to find (driveshaft, bulkheads, upper camber mount, and diff parts). I also think it could have benifited from lower shock towers and short shocks along with somehow getting a gear diff in the rear. The towers Nd shocks are an easy fix if exotek wanted to do it, but the gear diff is a whole other story. That would probably take machining some bulkheads out of aluminum and fitting another company's (maybe the evo 6?) diff in there.