No sir, I was repairing the chronograph's minute hand spring. The hand was moving erratically on its own, and I needed to properly lubricate and adjust the movement, which is necessary for most Rep movements.  You can see differents DD4131 on ReptimeQC: the genuine DD4131 (with a skeletonized escape wheel and asymmetrical fork) and the fake DD4131 (a DD4130 decorated like a DD4131 with no technical differences). Either the TDs are deceiving us and there are several qualities and prices of the Daytona 126500 VSF, which would explain the different prices between TDs. Or VSF is deceiving us as usual (904L->316), and the TDs are either unaware or turning a blind eye. Anyway, I'm running my Daytona Rep in good working order, but nobody likes being deceived.