So the replacement PM they sent me has died now - lights come on, but it no longer transmits data (can't see it on the phone or head unit). Tried plugging into power source and it just charges as normal. Happened at the start of a 100mile event where power would have been really nice to have (it was working day before).

I will no doubt be having to send more videos to Xcadey for another replacement, but am accepting it is just a trash PM (shame, as the cranks are ok).

In latest news from "cylists using power meters for normal cycling things" was doing 3x10min low cadence threshold intervals yesterday ... calibrated when I left home - first interval seemed too easy, second was even easier, with power reading even higher - stopped and re-calibrated again - third interval was 'correct' (confirmed by looking at HR). This sort of thing makes this PM useless unless you are calibrating every 5min.

There were no sprints beforehand, so not sure what caused that particular issue. Temperature maybe - drops quite quickly in the UK in the evening at this time of year. Also starting to creak a bit, so maybe need to pull apart and re-torque again... Given I bought if for a cheeky weight saving, I think I will just have to pony up for PM pedals and ignore it is even there. My 8 year old 4iiii LH crank PM was bulletproof consistent (I rarely used to calibrate it!) Shame Shimano cranks are so heavy ... :-(

Mine has completely failed ... it suddenly started to either read crazy high or crazy low, while the cadence seems to be reporting correctly. No amount of caibrations fixes it.

Have reported to seller to see what they say, but suspect I will end up having to deal with XCadey.

As promised, update of my experience for Trek Madone with T47 internal BB:
- Delivery took a few weeks, but no additional charge for delivery in UK (VAT was included at checkout, and I had bought some other items)
- Cost was under £300 with the Ali Express sale at the time
- Weight for the 172.5mm was 500g exactly (excluding spacers and rings)
- No issues with pedal threads (I did give them a clean out first in case there were any debris in there)
- I installed Shimano Ultegra chainrings (52/36)
- I initially installed crank with 2mm spacers each side, but once torqued to (vendor advised) 40 Nm the NDS spindle was completley flush and preload would not move (though cranks did rotate and shifting seemed fine)
- I thought best to reduce spacers on the NDS so tried to remove crank to adjust ... It didn't like it - the DS connector on the spindle kept getting stuck in the BB bearing - the BB bearing ended up coming out with the spindle ... 🤦
- At that point I just let my mechanic install it (I needed him to do other stuff on the bike anyway) - not sure of exact spacer combination he used, but he left enough visible spindle for one turn of preload

Only had one decent ride so far - as others reported crank seems very stiff and Q-factor feels slightly wider - similar to the KICKR bike I use (but have not measured it). The slightly shorter crank does as you would expect - open the hip angle a bit and I spun slightly faster. At a high level, the PM numbers seem comparable to other PMs I have used and the reported L/R balance aligns with what I have seen previously. At some point I will borrow a Neo 2T to validate against (and adjust scaling if needed).

Not super familar with SRAM standards but yes can see 3 bolt might potentially fit (albeit not necessarily a good idea!) 3 bolt is out-dated anyway, so does seem if you get this PM you will be committed to those Xcady cranks. ~£300 seems a decent deal for PM carbon crankset but there is just so little information about these cranks and they're not 'that' cheap... (going to price up other options, and might cancel)

Note that vendor has offered the old xcadey alu crankset if I really want 175. Limited value in that given goal was to lose weight compared to Ultegra with LHS PM (might as well get Magene P515)!