Joined: Jan 2008
Posts: 23,645
Likes: 1,109
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Since the LBS showed you how to use the tool, I would trust the tool. Also, try the tool on a brand new bike (take it with you to a bike shop). See what you get there.