Seems you'll have to change your signature. "Eventually" doesn't apply any more

And IMO you're welcome here (it's a "CAAD", isn't it?) - but you might not want to post that pic - with the rear rack - anywhere near the '41'.

I have a rack that I mount only when doing rando rides of 200 miles or longer. It clamps onto the seat post - and with the CAAD's standard aluminum / carbon-wrapped post, I think it's up to the strain...