Aluminium Greenhouse Sliding Door Bottom Slider

Either you have broken original part or realised how rubbish original slider, this should be ultimate fix.

In case your greenhouse is different please post your remix, I've included Sketchup file.

Printed in Filamentive recycled rPLA and been using this slider for 2years now which is still going strong (2x UK winters, single digit temps with almost no below zero and 2x summers mostly in direct sun half of the day)