Hey, i‘ve made this simple 2 spool storage, which you can easily put on you a1 or a1 mini to store extra spools. It doesnt require extra parts, because the closing mechanism is clmpletly printed! In addition its an easy print on one plate without supports. I‘ve got rid of the ptfe tube connector, because the only purpose is minimalistic and room saving storing. You can also print it for only one spool to make it even more compact. Theres no space issues when mounting it next to your bambu lab spool arm. I uploaded the model on my profile if anyones intrested, it doenst really get any attention.