So first off, I am not building a bike frame. I am designing and building a captains chair for a quadriplegic for a sonar sail boat. It will be similar to what can be viewed here but with a bunch of modifications.
The design that I linked to above used a shimano un-55 bb, and a NOVA shell but they did not call out the dimensions of either. I have not done much bb work so I dont know what to use for either. (Parts are linked to the sites where they were purchased)
My questions are:
1) Which BB should I use with the NOVA shell?
2) What will the width of the crank arms be with the specified bb?
3) If I weld the shell, I assume it will still fit the bb as it is intended. Is this correct?
Thanks for your help!
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Thread: Bottom bracket help