I'd most likely get slated for saying this on Vintage. - However considering the value of them:
I'd be very careful when mounting them using the black profile tool.
I bought a set of profiles at the beginning of the year and it stripped the chrome on one arm straight off, just came off in a big flake, I was gutted.
I put the other arm on using my traditional method 'A big block of wood over the end and a mallet, then taped them on'
No problems, it slid straight on.
Just a heads up - Nice looking cranks