"Wilfred Xavier Pickles" wrote:

I chose the 1/2" to keep the weight down a little, not particularly
b/c
it was cheap.

What would/do you use for such an application? The sled base is
something like 24 x 32".
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I like to use Birch ply AKA: cabinet ply, die board are some common
names.

Standard sheet size is 60" x 60".

Thicknesses are standard US, not metric, available in 1'4', 3/8",
1/2" (9 ply), 5/8" (11 ply), and 3/4" (13 ply).

There are no voids.

For a sled I'd use 9 ply (1/2") for the base and 13 ply (3/4")
for the verticals..

I like to seal my jigs with a wash coat of shellac, it helps to keep
them clean.

I cut shellac with equal parts of denatured alcohol, then apply 3-4
coats with
a throw away 2" chip brush.

Have fun.

Lew