Spool Rack adapter for Bookcase

Based on the Spoolstand by Robinvan89, I've converted the stand to be a bookshelf adapter.The idea is that instead of a flat shelf, replace it with these adapter and two rods. I keep the circle opening to the original 27mm sizing. This fits 1" wood dowel rod loosely and ¾" PVC tightly. PVC works better for shorter shelf lengths, or you may see some bowing. I also adding securing pins. This allows the adapter to be placed on the bookshelf, then the rod is inserted, and finally the securing pins are inserted into the adapter. This prevents the rods from slipping out of the adapter. It's available in two versions. Version 1 uses a printed onto the adapter peg for insertion to the bookself wall. Version 2 has holes to insert metal pegs. Metals pegs can be found on Amazon or other retailers:50 piece - https://a.co/d/aFCGv8N50 piece - https://a.co/d/3gjHYhw (toss the plastic part)120 piece - https://a.co/d/2Pxm0x3