When planning a DIY multi-zone mini split, Zone Air and MRCOOL are solid picks...

https://edgarscoolchat.talesignal.com/posts/zone-air-cut-to-length-line-sets-how-do-i-measure-the-run-correctly

When planning a DIY multi-zone mini split, Zone Air and MRCOOL are solid picks that keep things straightforward without sacrificing performance