I thought 170mm cranks were short already, are they really going to be too long? I think I have some 165 to try but I never assumed they'd be too long, I used to use 172.5 on my commuter. So addition 165mm cranks will mean raise saddle 5mm as well?

also on the subject of stopping my feet scrubbing and hitting frame, if I do that I feel like I push my heel out. Look at my stance
Found 165mm 50 34 as well