Want to put Shimano crankset ( yes, some folk do consider their road cranks to be gopping) onto CAAD10 so need these shims.
Has anyone encountered problems by doing this?

Well, to be honest I wasn’t aware you could shim them to do that, but personally, I wouldn’t. Cranks are the creakiest things on bikes and take a lot of stress and crap thrown at them and I can’t imagine adding a shim is going to do anything other than cause problems somewhere down the line. Personally, I’d stick with the 30mm axle.

I have some of these I don’t use for sale, work pretty well:
http://wheelsmfg.com/bb-30-shims-shimano.html

Creaky.
Bin the bb30 bearings and use one of these and a ht2 bb

^^ that looks, erm, “robust”,Rorschach, What sort of weight is it?

Let’s just say that they only expect to make about 10 out of the salvage from this 😉

We use Parlee BBkts for the Shimano conversion, that way there are no shims and no creak, really nice quality too