Is this the place to post my Q.?

Well - I was on my new pride and joy, enjoying mile 52 of a perfect days ride, climbing a roller and wondering if my cleat was coming loose, when suddenly the crank came loose. I stopped, uncleated, and pulled the crank right off.

I probably have less than 150 miles on the whole bike, kept off my trainer, and am really surprised this happened. It is a Gossamer/FSA double crank set on an otherwise full Ultegra/SL group.

I took it back to LBS, where the employees discussed seeing this happen three times already, and kindly fixed it with Locktite. I was told that "it should be fine, but to keep an eye on it". Wow - I'm not overwhelmed with confidence.

I realized this morning that I don't want to go out on my bike worrying about when my crank will fall off again. I have two small kids, y'know? I called LBS and spoke to the owner. He politely told me that these things happen from time to time - but I said I'm too squeamish to use this crankset, and asked him to work a deal where I upgrade to the Ultegra/SL double. He agreed and ordered it - we did not discuss terms.

What would you do? I don't want to be a d*ck, but I also think that I should not have to buy a second crank at full retail, nor is it acceptable to have to worry about the locktite on my original crank loosening up in another 100 miles. What do you ladies advise about this whole thing?

Thanks - J-bird