Hi :) Here is a custom pinning tray I made at fit for me, with me own requirements. As it might interest other fellow locksporte, here it is available for everyone ! FEATURES : Dimeion : 21 x 21.975 cm (8.27 x 8.65 inches), so it is large but printable on most level entry printe (ender 3, prusa, alfawise, ...). Enough space to gut 2 moderate content locks or one heavy content lock. 2 core slots (front part of the core can be placed on left or right side of the slot, but if place on the right side the core can lay with a key in it). 2 key slots 2 x 7 V shaped pin grooves. I like V shaped pin grooves as pi automatically lay vertically and well aligned when you put them in them. Also, V grooves are wide enough so you can put not only pi, but wafe, slide, or disc detaine discs. 2 x 21 disc detainer slots 2 main storing areas. The storing areas have an opening in their wall, so you can neatly put down an item longer than these areas (like a screwdriver for example). Tiny grooves between areas eure small parts will not roll from on area to elsewhere through the opening. Lots of slots for keeping tiny parts tidy.