A little while ago, i was having some issues with my Park Tool TS-2 wheel jig. Every now and then after building a wheel i was finding it wasn't perfectly centred. Maybe a mm or two at most, but enough that i noticed it. Obviously, i went back and centred the wheel and then adjusted the jig. Then another wheel or two and it would happen again. Odd for it to happen only occasionally. Curiosity got the better of me and i spent a bit of time poking around the web trying to find if there were similar experiences out there and what to do about it. It turns out that there are. The threaded axle that arcs the uprights in and out to adjust for different width hubs is on quite a coarse thread. It seems that a micro change in position at the lower end can lead to enough error at the hub holding end to lead to a wee bit of lateral movement. Of course once you have identified this (i think i was noticing it more because i was constantly going between 150mm all the way down to 100mm OLD hubs) you get the Park Tool 1554-1 centering gauge, consider a rebuild if there is any wear (on mine there was none apparent) and perhaps get a dishing gauge...EVT make a superb one. It adds about 30 seconds to the wheel building process to check that everything is centred prior to truing the wheel.
But, you know how it goes: i can't ignore it. So i get to looking at other wheel jigs. The issue is that i don't build enough wheels to justify what i would really like - a P&K Lie.
Watch these videos for a bit of a description of why it is such a refined tool.
Amazing dedication to making a tool as good and useful as possible.
Slightly less terrifying cost wise are the DT Swiss, and Centrimaster Classic.
Then there is the new one sided Centrimaster.
Hmm. We'll see. Anyone need a well cared for Park Tool TS-2 cheap?