Hi Guys im looking into maybe building a small CNC for cutting quadcopter frames. iv been doing reprap for 5+ years so i have spares of NEMA17 , ramps boards etc etc etc. i also have some some 3x1Meter alu extrusions (20x20 i believe) any suggesions on something i can knock up on a super low budget using the parts iv got and a few extras? max cutting area needed will be 300x300mm.