Shorter cranks?

[7rider]

If you are interested, a guy named Mark Stonich shortens 175s to any length you like, he does an absolutely beautiful job, they look like manufactured cranks, not like they've been shortened. He has to use 175s to start with because 170s are hollow or something.
http://bikesmithdesign.com/

The site says they recommend shortened cranks for recumbants, only, as a safety factor.

Pardon the drift, here....but measuring crotch to floor is not your "inseam", but perhaps your "leg length". Isn't "inseam" what you would wear for pants - which would go to about ankle height? Say, 3" shorter than inseam?

Alas, as with Kitsune06 and Mimi - I offer no helpful insight.....