Build it. Run it. Find the flaw.
Shape a lure one component at a time, then change the retrieve and watch its action respond. Tune it for a trial, study the readout, and send the result to a fish.
As an Amazon Associate we earn from qualifying purchases (details). Lure specs are the makers' own printed figures. The Tank does not model running depth or action for real lures, so a match means similar size, weight and build, not equal performance. Parts are material suggestions, not tested to the model's numbers.
Coarse by design — grid cells, not millimetres. It models the couplings that decide whether a bait works (mass against buoyancy, lip against righting moment, tie position against action), not the exact depth a given bait runs. What the model does and does not do.
Want a known build to modify? Compare twelve lure archetypes, then open any one here with its blocks already in place.