found basically the same thing
John Truxell-Svenson (jvs)
>I bought both of the JW mortise gauges; wanted something different from my old pin gauge, and was tempted by a link Pam or Wiley put up to Hiraide a few months back. That was to some beautiful stuff, but I wasn't quite wiling to cough up the $$; even the knives alone make Tite-Marks look cheap.
Not perfect, but they both work pretty well. Once the cut is measured, it's not too hard to hold the knives in relative place while sliding the bottom one to adjust the offset. You have to be careful, but it can be done, and once the are screwed tight, the lock in that position is positive. Never needed more than two for a particular project to be set at the same time, so spending a few minutes adjusting them and then locking things down until done works fine.
Still looking for the perfect mortise gauge, though. The Tite-Mark or Hiraide's gauge may be it, but the JW's work well enough to push another purchase down the list for now.
/jvs