I've posted some pix of a Cinelli bar that is milled for internal routing of bar-end control cables. I had never seen this approach before, and it appears to be quit professional. No judgment on the reliability factor, but it sure makes for a clean installation. The bike had Suntour bar-cons with this set-up.
http://www.wooljersey.com/
Wayne Bingham
Lovettsville VA
>>>I am thinking of drilling exit holes on the handlebar about three
inches from the stem for the bar con housing to exit, any comments on
the pros and cons of this approach would also be appreciated.
Lewis Ting<<<