Winder inserts for Anycubic plastic spool

Edit 1: FWIW I originally thought these were 20A cords, but they are actually heavy duty 15A. The files still say 20A and I'm not changing them :-)

Edit 2: I made several of these spools into winders no problem, then ran into a couple that were slightly smaller (~196mm vs. ~200mm). If you run into a smaller spool you'll have to scale everything down slightly. I suggest printing one of the side hole inserts before printing the whole project to make sure it fits or to find the right scale.

I sell a few 3D printed winders for antenna wire, coax, cordage etc. like this one https://dreamlabnc.etsy.com/listing/1684675942/winder-reel-475-120mm-diameter-reel-for and set out to design a bigger one for some 15A heavy duty extension cords I have, when I looked up and saw all these old Anycubic plastic spools I've been saving for some unknown reason.

They were the right size for 30 feet of cord but I needed to turn them into a proper winder like my other ones, so I designed some inse