UPDATE: I've added a Version 3 of the tray with a little more rigidity built in. I have two eBoxes and the original design works fine with one, but has warped a little over time in the other. The extra fillets and bulk should stop that happening. I've also added a 3.5mm spacer, alongside the original 3mm spacer, as the original is sometimes a little thin depending on your printer settings.
This is a remix based on a remix of a remix!
The eSun eBox is flawed in many ways and is not value for money at ~£60 here in Scotland, and I can't understand how eSun thought it was even half way to being ready for market (even the updated V2 still has some garbage features), but with a few tweaks it can be made serviceable.
Aside from the awful PTFE tube grommet (for which others have designed solutions), the big issue for me is that the roller mechanism is too narrow for a number of my 1kg filament spools, which has made it completely unusable with certain types of filament, like Rigid Ink.
I realised that the stock rod and…