Screwdriver Holder Slot Tightener
This reduced the slot width of the 8.5mm slots of the Screwdriver holder by dodasch (https://www.thingiverse.com/thing:2439355). Like this the smaller screwdrivers with smaller shafts don't tilt that easily and different sized screwdrivers can be placed side by side.
Made Models to reduce to 3mm, 4mm, 5mm and 6mm. These can be pressed-in from the front with a screwdriver. It holds thigh in place and if the sides tilt inwards, these can still be glued.
Check the needed size first with the dedicated screwdriver and let there be a little bit of play.