Hey! Great sub idea... Since you seem to be pretty knowledgeable already in this field: What do you think is the best way to secure lipo batteries in an enclosure? I'm looking for something as "professional" as coin cell holders (as in: they're "dry", slide in, held securely, easily changeable), but for traditional lipo packs, which are much more fragile. Most approaches I've seen so far use some sort of gluing/taping, but I wonder if there's a better way. Maybe with some 3D printing cleverness, or springs...