ive recently cut out an i3 frame out of 1/4" aluminum on the cnc, similiar to twelvepro's style with the back braces but modified for m10 threaded rod on the y axis. i also upgraded some of the printed parts to 1/8" aluminum parts, the only printed parts are the x carriage, x motor bracket, x idler bearing bracket, the heated bed lm8uu holders, and the endstops. i am the US and can make more, would any one be interested? id be asking 200$ for the frame and 50$ for the aluminum upgrades. i used the printed parts from alkarny on ebay.