Hi, I'd like to share my experience of the FM126 frame with you. This isn't my first frame from Mondince; I've previously built a few gravel bikes with them, and I've had no problems whatsoever with them.

Having read through the whole thread, I didn't have high expectations of the FM126, but when it comes to build quality, I was pleasantly surprised – all the surfaces have been carefully finished, perhaps because I received a revised version of the frame.
After riding over 1,000 km, I've found no signs of cracks or localised delamination in the frame. As for stiffness, I can only compare the frame to the Orbea Orca OMR and the Giant TCR; it's on a comparable level, though this is just my own subjective impression. Certainly, due to the wide fork, the front of the bike is much more responsive compared to the rear, but I don't feel that the bike is skittish during descents at speeds above 70 km/h.

Frame: FM126 size 54
Handlebar: Mondince 360x110mm actually 100mm
Wheelsets: Serande TRS65S - SR268
Tyres: Continental GP5000 - front 30mm, rear - 32mm
Rotors - Galfer Wave 160/140mm
Groupset - Shimano 105 R7100 Di2
Bottom bracket- Bikone T47 Steel bearings