Greg, G. wrote:

sr_wood said:

Greg,
I purchased a tenoning jig from woodcraft that ,by all practical
purposes, is the exact same jig as the Delta. I'm having a similar if
not the exact problem. It wants to rock right to left. I've been
bitterly trying to figure out what to do with it for about 2 months
now. Great advice on the granite stone, I'll have to lap mine also.

I looked at a few of the other brands as well, and picked the Delta
because of it's past reputation and heavier construction. And for
some strange reason, I want them to stay in business.

I have already flattened the base, and made a few test tenons.
Tweaked up and polished a bit, this jig works great. It's unfortunate
that this tweaking process is becoming SOP for many products.

Greg G.

Sadly this is not an uncommon problem.
A few years back I invested in an inexpensive granite surface plate and a
lot of sandpaper of different grades. It seems like those are almost as
necessary as a screwdriver in assembling modern tools.

--RC