Kossel Alt with optical autoprobe, m5 bolts

**UPDATE 1: Here is the wheel carriage conversion parts for this printer:**
https://www.thingiverse.com/thing:2577466

All parts for the main frame is for M5x10mm bolts. Only the part "Kossel_Rav_Alt_top_frame_optional_support" and "Kossel_Feet" need optional m6 bolt to screw it to the vertical frame ends. To do this, you need to tap the central holes of the vertical frames.
Effector is derived from here:
https://www.thingiverse.com/thing:1134299
Original carriage was for one LM8UU. To ma