uploading my old design from thingiverse to Printables

this is a modified version of the design I previously uploaded:
https://www.thingiverse.com/thing:3000842

and is still fully compatible with:
https://www.thingiverse.com/thing:2235462

This version uses an 8mm x 100mm steel rod as an axis making the clamp much stronger than the plastic version.

similar to the previous version a small 30x8x1mm spring (or similar) should be added to the center pin on part 2