The click you think may be coming from BB might be the FD cable endcap hitting the crank arm. I had that on my road bike after I'd replaced the FD cable. Took me a few minutes turning cranks off-bike mid-ride to notice as I was looking at BB while doing so. You saying it's a double click though is more likely not that unless there's a recess in back of crank arm like the one on the front. You're 3rd pic of bike on page 17 makes it look like the cable end is sticking out.
If it's not that I'd suggest your knees instead of your hip. :mrgreen: