Question about CrazyDevy and the Reissue / KO Devastator

Hey all, I have a question about the CrazyDevy parts for Devastator. Do all of the CrazyDevy parts fit with the knock off / reissue of Devastator except for the forearms? I only noticed one separate set for the KO as opposed to the genuine Devy.
Also, is the KO one from China that's on Ebay pretty much the same as far as quality? I know Optibotimus uses the KO in his review, so I would assume it's pretty good. Anybody else weigh in? Thanks
Also, is the KO one from China that's on Ebay pretty much the same as far as quality? I know Optibotimus uses the KO in his review, so I would assume it's pretty good. Anybody else weigh in? Thanks