I have a new FSA slk compact carbon crankset on a Merlin extralight. Cranks were fine until recently when they developed a "creak/clicking" sound which occurs only while pedaling. It seems to be coming from the bottom bracket and resonates through the frame. Megaexo bottom bracket and crank bolt was tightened again by LBS. This took care of the problem for all of 50 miles when the creak came back. Crank bolt was found to be loose again and tightened. This process has been repeated 3x cause each time the crank bolt loosens up again and the creak comes right back. Torque is done with a park tool beam type wrench using specs between what is recommended in the manual, and what is stamped on the bolt(100 kgf-cm difference between the two, don't ask me why). Was thinking of using loctite, but I'm not sure if that would void my warranty. Anyone else experiencing the same problem? Will put in a call to FSA tomorrow. That sound is driving me nuts.