I’ve used a Stages LR dura ace powermeter for several years without issues. Moved to shorter cranks and have been using a 4iii dual sided dura ace powermeter for the past several months as I couldn’t find a Stages LR in that crank length. I’m a bit frustrated with the number of dropouts I’m having with 4iii and thinking of moving back to Stages or a spider-based powermeter like Quarq or P2Max. I’ve read about the “inaccuracies” with Shimano based dual sided powermeters and can anecdotally relate - power is always lower when my left powermeter battery dies and I’m relying on just the right. My LR balance is also usually 55/45 which I read is common with Shimano but I don’t care about it so much as long as overall accuracy is ok.
I get there is concern with LR balance issues with shimano based dual sided powermeters. What about the overall accuracy of the powermeter? If that’s a concern, then I’m thinking of going spider-based powermeter.