HG ball head was found here and painted by me: https://cults3d.com/en/3d-model/game/hg-haro-and-ball-ver-ka-heads
I threw together some hair adapters for 30MS and Acerby. Allows you to swap out your current hair separator for one you can plug parts into. Includes 2 types of C-Clip connections, a 3mm peg connection, and a 3mm hole. If you end up using it let me know! I'd love to see what people can come up with!
The files are available on both Thingiverse and Makerworld:
https://www.thingiverse.com/thing:7345150
https://makerworld.com/en/models/2741269-30-minute-sisters-acerby-hair-slot-adapter
Made this edit a while ago and never shared it anywhere. Here it is UwU