I searched around and found lots of info about S13 and S14 r200's but i have a question about an S15:
Will the NON-LSD S15 output shafts fit into
a Helical-LSD S15 diff?
I would imagine the output shafts of the HLSD have more splines or have a larger diameter b/c its on a SPEC-R turbo car
or
Nissan is efficient enough to manufacture both LSD and NON-LSD output shafts to be the same size/diameter so they could cut costs?
Any ideas?

Anyone tried this?

Yes, No?
thanks folgerz