you mean Jagwire?
lol, yes. This is my first time not running regular housing and it's all because of the rear Aerolink brake. Regular housing isn't flexible enough. I ended up running the links housing through the handle bars too and it was INFINITELY easier than regular housing. I'll never go back. I wish eTap was in the budget though.
I'd suggest snatching a Sram red bb30 crankset...
I already have a set. Full size though and even worse BB compatibility. I also plan on installing a P2M in the future. So the Red will be for sale on the bay soon NIB.
How's the ride quality? Thinking of doing a similar build
It's taken me 3+ months to build as I bought every component separately when I could get them at a good price and I just finished. Other than a few trips around the block to dial in the shifting I haven't given it a proper ride yet. But it is stiff. Caveat, these are my first set of carbon wheels.
does the handling feel twitchy due to shorter wheel base?
Not to me, but this will likely be relative to the geometry you're coming from. I've always ridden compact frames. Long arms and legs, very short torso.
does the chain line okay?
No issues with the chain line or shifting.
does the bottom bracket area flex at all?
do you feel confident in the built quality?
Yes, but I'm only 60kg and a former competitive distance runner so I'm not flexing anything.
I feel confident in the build quality but there are a few things I've experienced:
-The provided headset is a heavy, ugly turd. Don't even install it.
-I had to perform some minor sanding of the drive side BB shell to fit the cup. Even then it was still pretty tough with a homemade press.
-The seat post will require carbon paste. It couldn't even hold me torqued to 6nm without it. This has been near universally mentioned in other reviews of this frame.
do you think we can use 25c at the rear at all?
Yes, sorry for the very poor pic(the seat is actually level). It doesn't show the space between the rear tire and seat tube accurately. The rear of the seat tube is also concave (to the tire) in shape. The limiting factor for me is the brake caliper not the frame. Just now measured and I have about 10.5mm of clearance. But 25c will definitely be the max. I don't have any 25's as I'm cleaning out a bunch of 23's from the parts bin. I actually like the 23c profile with the rim. I'll copy a post I wrote on the wheels on RBR below.