Bar end brakes and handlebar swapping I have one road bike that I use mostly for commuting, sometimes for fast alone rides and infrequently for group rides.  

I was thinking that since most of my riding is alone I should put my tri bars back on my bike.  I had an extra set of drops in my closet so I chopped them off to make some bull horns.  I now have a sweet set of tri bars.  I just need to pick up a set of bar end brakes and I will be all set.  There is only one kicker:

Since every once and a while I want to do a group ride I would like to be able to swap out my tri bar setup for a drop bar setup.  Preferably I would like to keep the brake lines on my bike and just unattach the lines from the break leavers.  I had an extra stem lying around so I can just pull out the step from the head set and volla!  

Went to my LBS to pick up some bar end brakes but this is what they told me:


With all bar end brakes you have to run the brake line under the tape so you could not switch out the bars without retaping your bars each time.  Anyone know of any bar end brakes that the lines run NOT through the bar tape?
Switching between bars frequently (once or twice a month) will cause major wear on your bike and you should pick one thing and stick with it.  


Is there any truth to either of these statements?  I am somewhat skeptical.
Assuming you've got modern brakes, the complex cable run you'd have to set up for this likely makes it not worth it to try for cable splitters.  The splitters (daVinci Easy-Split, Bruce Gordon QS2, etc) require a bare cable run, so you'd need a pair of cable stops between the front brake and the front brake lever, not found in most modern setups.

Even if you didn't have the housing running underneath the bar tape, you'd still need to loosen the cable to remove it from the brake, and re-tightening your brakes each time to enable a bar swap would get old quickly. It's not the case that swapping bars and stems frequently would put undue wear on those components, but it certainly increases the chances that you'll over- or under-tension parts at critical moments and cause a failure.  Particularly if you're swapping stems you would need to be mindful of headset preload.  If you end up unbolting and rebolting cables frequently you would increase the wear on them, as the clamping force deforms them and will cause them to fray.

If your bike has cantilever or centerpull brakes with split cable stops you could set up two complete cable runs that wouldn't require you to disconnect the brake cables, but that's unlikely on a modern-ish road bike.