I cannot open it, so I don't know. The mount is rather one of a kind, the angle is strange, the holes are angled. I tried to use one I have for the shuttle, and it's different. The mount fits, but the garmin is really angled. Could you please provide a screen. Moreover, someone above put a photo of how it looks.

This is how this specific model looks. By the way I ordered the frame (6 week waiting time) and in the mean time a T47/68 BB, 2 spare headset bearings and an extra "Garmin" mount, which is either flat for regular inegrated handlebars (which I have on other bikes) or with a small wedge/adapter for Cervelo S5 handlebar < 2025 (angled holes which look very similar to this Avenger).
My "project" is to install full Ultegra on this frame (stripping from another frame which will install Force AXS 1x), new ICAN 40 II and/or Serenade 4550 wave wheels. Being a size S/52 my target would be to finish it around 7/7.2Kg all included  .

Very interesting frame, very temptted to get it (I found the french shop, thanks for the tip!).
Unusual but *important* (for me) as I don't like to look for specific bearings (see Giant OD2), which headset bearings are used? Thanks if anyone can get me this info.

I guess I have/had too almost all the PMs on the market since years (exept SRMs, but I saw files from former clients). There's probably an higher degree of error on a single side PM (and Shimanos) than from these last "Chinese" spiders PM. Not because of hardware (lack of) specs or factory miscalibration but simply because none is pedalling 50/50 (or even 50.5/49.5 thus on/over the +/- 1% accuracy).
In general, with the "democratization" of PMs I saw a lack in general precision on all the spectrum, no matter the price, with the only notable outlier being Favero Assiomas (they learnt a lot from the BePro, remember them?).

Pulled the trigger for €129 and something with alu crankset (coupons+PayPal discount)

It looks like (EDIT aka "resembles", not "it's", for the geometry_nazi ) a Van Rysel RCR-F  with a chunkier rear triangle

Hello everyone, 1st post here but not my first bike, I guess this is my #20ish installed "no brand" bike in 15 years.
All went fine, especially as I decided to go AXS so it's super fast. What required more time is the routing through the (separated) handlebar. With a traditional handlebar, which requires an open window in the headset top cup, this would be easier but less pleasant from an aesthetic POV. I'd do this way next time (or the first time I'll need to change headset bearings).
One problem so far, for me, it's the "carbon" saddle clamp: as others noted it's too small for a 9mm height rail. I just wrote Chris for an updated clamp. For now, I Installed the 7*7mm clamp with a heavy Fizik saddle.
About weight, well...it's not its strength being a little "porky" but it's not too bad either (8.2 Kg as in photo).
I'll try it in the next days, checking seatpost "slippage".
Going back, I'd go with a 177, but now here it is.
Boring matte black, but hey, (less) grams!