Since you don't have the exact # of those packs you'll need for your 24v setup, I was thinking of maybe tying those packs together with the nickel busbars... Like 3 of those packs together would make 2 individual 3.2v batteries. All cells facing one way will be one 3.2v battery, and all facing the other way would be another...which may make for less criss-crossing? That way you'd use 12 out of your 14 packs, and have two left for spares. It's tough to give advice like that without seeing and handling them up close, but it seems like you have the knowledge to clearly handle that on your own.