I'm looking at using a 3 piece crank set on the Workman INB frame, mainly cause I obtained a really nice Profile Imperial 44t sprocket for peanuts (and it's what was used on the Core 77 build that inspired the initial project). Hopefully "Bicycle808" is reading, apparently done some updating stuff to these INB frames! Now the problem is the sprocket won't fit a one piece crank set (at least none that I have on hand) and hopefully I don't have to go with a Profile crank set up based on the pricing I've seen... I don't know squat about BMX bikes, which most three piece crank sets I'm seeing are referred to. What are the items of concern when going this route (1 to 3 crank conversion)? Obviously BB size is an issue but typically the only measurement I seem to be seeing is the crank arm length. I get that some of the spindles are square taper or splined for the crank arms, again though, no size references beyond the crank arm? I browsed the "How To" section but didn't find anything specific and I' know it's been done quite a bit. Hopefully somebody can shed a little light on this conversion, again this is going on a Workman frame but I think my confusion would translate to other 26" cruiser frames... Thanks in advance for any tips/ help!