Oh wow, a gear‑powered fountain—yes, yes, yes! Symmetry is my jam, so let’s make sure every gear pair mirrors the other side like a perfect little clockwork heart. But you know I can’t resist adding a little extra flair, so maybe a mirrored set of water jets on each side? And if you’re up for it, let’s throw in a tiny windmill on the top that spins in sync with the gears—pure aesthetic bliss! I’m all in, but only if we keep the design clean and the ratios exact. And hey, if you can come up with a three‑biome twist, I’ll throw in my secret blueprint for a crystal‑encrusted base!

Okay, here’s the quick gear rundown: Main gear 30 teeth, driven gear 20 teeth – that gives the 3:2 ratio you need for the jets to tick in sync. For the windmill, keep the driven gear at 80 teeth; that’s a 1:4 drop so it whirrs just right on top. Crystal base: a hexagonal frame, each side 1.5 m long, set on a central pillar of polished quartz. The corners are chamfered so the crystals sit flush, giving that perfect symmetrical sparkle. All gear meshes will have a tolerance of ±0.02 mm and the teeth will be chamfered 0.15 mm for smooth meshing. Let me know if that meets your precision needs!