Oops - sanded away flat surface

Hi -

I have a 19 x 22 x 3/4 in. piece of birch ply with maple edging. It was
meant as a simple router table top (nothing fancy; just sq/flat). The
maple is 3/4" wide and I routed a groove in the ply edge and tongue on the
maple. The topside of the maple needed a bit of tuning to bring it down
flush with the ply. I planed the maple down most of the way then used the
belt sander to finish (it's an underpowered Makita and is not especially
aggressive; used worn 150g).

The problem is that I sanded into the birch ply in one corner too long
where the straightedge reveals a definite gap relative to the center (and
I can feel the bump running my fingers over it); in the 1/32" range:


----------------------------------
| |
| |
| A |
| |
| |
| XX |
| XXX B |
| XXX |
| |
----------------------------------


The "X"s are the depression and are 3 in. from the edge and another 8
in. to the center. The edging ahead of it is not as depressed - I think
the maple may have been angled (slightly) down toward the depression so
the sander was pointed into the ply instead of parallel to it.

My question is (assuming there's no way to repair the depression which
doesn't include sanding everything else down to it) should I position the
depression on the outfeed side (bit is "A") or infeed side (bit is "B")?
Does it matter?

Mike
--

mikeballard at symbol verizon period net

"If your main parachute fouls, deploy your reserve. If your reserve is
also fouled, you have the rest of your life to get it straightened out."