Quote from: Asco on October 21, 2025, 07:01:22 AM
After having the pinch bolt work itself loose, I accidentally stripped the threads on my left-side crank arm by putting power through it. I've since replaced it with an Ultegra R8000 crank arm and have had no problems with that. That might be worth a shot, you can often find the left crank arms for cheap used from people who buy left-sided power meters.

Edit: You may have to fiddle with some spacers to get the preload right.

You're probably right. Now the left arm moves 1 mm back and forth before I tighten the bolt. But the Shimano crank design is completely different from the Pes crank and looks odd with this combination but nevertheless it was a bad design of the pes crank ver 1

After two years of riding, I finally gave up. For the first two or three months, I heard clicking/squeaking noises. I thought it was the bottom bracket, maybe the Ninja-Token bearings, maybe the wheels – lots of different ideas. But it was the left arm of a Magene P505 Base. After reassembling it, it helped for 200-300 km, then the noise reappeared. I ordered a new bolt, but that didn't solve the problem.

I like the look of the P505 Base, and the accuracy is quite good, but the noises coming from inside it finally got annoying, and I gave up. I put it on my indoor trainer and am looking for a new power meter for my outdoor bike.