Joined: Feb 2012
Posts: 19,373
Likes: 5,515
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
It probably doesn't matter which tube you drill, providing yoy do a clean job. The choice of which tube production frames have bottle bosses in has only spec issues and not stress issues. Not doing a boss set decreases the cost, not the "strength". Andy.