Anyone got shorter cranks willing to let me try?

[spike]

I am experiencing toe overlap issues with one of my bikes - a common thing on some bikes but it really irritates me. I want to try shorter cranks to see if it solves the issue and also to see if I get on with them. I am 185cm tall and use standard 175mm cranks on all my bikes so a bit hesitant to invest heavily in shorter cranks and find they don't suit me - or that it does not solve the issue! That said my research to date says differences would be minimal and I would adapt quickly.....

So anyone got 170mm cranks they would be happy to lend me for one or two rides? Need to be Shimano Hollowtech II compatible.