I'm going to build a piece of half-lapped lattice that will go into a
frame (not diagonally) like this:
http://smithandhawken.speedera.net/w...7/727826-1.jpg

Should I bother with having the lattice spacing at the edges be equal
to the spacing in the field? It seems that a little error will
propogate and cause the edges to be narrower or wider than the spacing
in the field, based on the final dimensions of the frame.

I'll be chopping mortises for the horizontal lattice members, and
letting the vertical members run about 1/16" short, so they don't
touch.

I guess I'm just a little overwhelmed with the thought of actually
laying this whole thing out so it's symmetrical. I guess the frame
width will determine my lattice spacing. In turn, the lattice spacing
will determine the frame height so that the edges turn out uniform.
Any advice?

-Mike