Carl wrote:
Hi Rich-
The bar bumps are exactly what you guessed they are.
Pad holder bolts are M4 x 10mm button head...included in bar bolt kit 437027 (also 1st generation SC pad holder kit 420488) if you or your Trek dealer want to get them that way. Side note: it would be very helpful if your dealer makes a quality claim related to the missing bolts. Helps us track & rectify things like that.
Absolutely do NOT recommend drilling and tapping where you indicated. I've used zipties for one end and bolted down to one of the threaded mono details before and it works...you may want to put a spacer of some sort between the mono and your cage at the bolted end though...otherwise the cage ends up at an angle and you risk cracking it.
The packing tip for brake cable slack is exactly as you guessed as well. Definitely helps for the front brake...not always necessary for rear depending on what stem you're running and how much housing slack has been left on the frame from initial assembly.
Carl-
Why would you want to install the cage like you've said above? Seems like you're trying to tilt the install / the way the bottle sits? So it's at an angle and not lying flat? Trying to figure out why. Is there a benefit?