Summary

I designed this very basic part to extend my Y printable area about 15mm. I had to do a little drilling and cleaning up, but it works great for what I wanted.

Instructions

I designed it for my 8mm threaded rods. attach it to the top threaded rod where your existing y endstop is. the pictures should help if my instructions are unclear. mount can swivel about the threaded rod slightly to adjust the distance you want.

just realized I uploaded the part at a weird orientation. just rotate it in netfabb or similar

Extended Y-axis Endstop Mount