I feel your pain, Colin. I bought a Frejus frame which is just too big for me, and I've been freaking out over the last few days trying to figure out what to do. Ultimately, of course, I know it's too big for me and there's no way to change that so I just have to get rid of it and wait for something to come along that's the right size.

Just go for the right size, if your busting your nuts standing over it it's obviously going to ride like a tank for you - and at some point you're going to hop forward without thinking and just nail them on the top tube. Not worth it. If it were too small for you that would be a different story - I'd ride the Frejus if it were 50cm (my size is 52~54, it's 56.5ctc/57.5ctt).