Summary

I couldn't find anyone who has already made this? There's a lot of free space on the extrusion to the sides of the bed, and the Y axis doesn't interfere or collide with Gridfinity items placed on the baseplate, so there is no reason not to have super quick access to tools.

Instructions: pry the square cap off the extrusion end, the scraper tool helps for this. Then, slide the rail all the way up until it clicks in place.

The model on the cover photo is The One SD Card Holder by atucom, the model on the back extrusion is the Nozzle holder for gridfinity by me.