Thanks for your thoughts on the brakes, CippoForLife.
If I knew your shop carried THM products I would have ordered the Fibulas from you - damn.
Anyway, a couple of comments on the THM Fibula brakes.
You mention that the front and rear calipers are uniquely different in design.
The most current iteration of the brakes has essentially the same design front and rear. The levers on the rear are bit shorter compared to the front. The picture on your website shows the older style rear caliper.
I'm running the Fibulas with Dura Ace 7900 brake levers on carbon rims. Braking power is slightly decreased (more so in the rear) compared to the DA 7900 calipers, but I expected that because the Fibulas are optimized for a different pull ratio. Modulation is on par with Shimano. Lever feel is crisp.
Almost half the weight of Dura Ace calipers. The pair came in at 142 grams with all hardware, except for brake pads.
Perfect centering of the caliper is a bit of a pain (I've been spoiled with the centering set screw on Campy and Shimano brakes). Once you center the calipers there seems to be some small amount of off-centering creep during usage. It irks the OCD in me, but in reality, it doesn't affect the performance of the brakes.
Yokozuna housings won't work with the adjuster barrels - way too tight a fit. I switched back to the Shimano cable housing.
Some nit-picky stuff:
Brake pad holders and barrel adjusters are silver. I prefer them in black, so I had those parts anodized.
The clear coat finish on these $1000 brakes is sub-par. Dust, pin holes and orange peel effect. For this amount of money I expect a better finish, like their Clavicula crankset, which is nice and smooth.
See the upper part of the caliper in the picture below:
The large recessed hole in front of the brake bolt is a big dirt collector, especially in wet weather riding. I'm not kidding. It was full of dirt and sand after a wet ride. Worse in the rear than the front caliper.
This picture shows the hole AFTER I cleaned it out. It's like a gaping, open mouth.
All in all, a very functional, light weight brakeset, with a few niggling issues.
The Fibulas are staying on the bike - but I'm not getting rid of the Dura Ace calipers just yet...