I know what you mean about mixing groupsets! Looks really bespoke though.....
Yeah the zero gravity brakes come with campy mounting bolts. They are Ali and weight a few grams. All brakes use the same pitch of thread so all you need to do is take front and rear off, the rear is the shortest length, and the front is one of the longest available, measure the length and order and refit! Shimano and SRAM bolts are steel and are best part of 15g+ and I bought one for a few pounds... There's another 10-20g reduced for a few pounds.
If your bottle bolts are 11.5g. My A2Z Ali ones were less than 1g each and a pack of 4 was about £4! That's another 6g+ off.
I also ditched the bar end plugs. They have no function on a summer bike as there is not going to be any wet road crud getting in there. The standard cannondale ones were over 20g the pair and I also had some bontrager buzz-kills which were over 80g!!!!!
Keep up updated about the top cap as that is an area I'd love to loose some weight there
It even been riding a year! Well keep it up! Keep an eye out for debris in your tyres if your running thin inner tubes. If you find anything let the tyre down, pinch the tyre and pick it out the re pump!
Garmin computers are good, and the new baby one is very light!