Slant Eye Joe wrote:

- snip -

Please, if you topdress, do yourself a favor and use SAND. It really
doesn't matter what kind or where you get it, just use SAND, not peat
moss or loam or anything like that.

In clay soil, like the OP (and I) has, you want to encourage earthworms
to keep it aerated. Therefore, using sand as a topdressing may not be a
good idea. For example, see:

http://www.ag.ohio-state.edu/~clar/hort/febart02.htm

Here's a pertinent excerpt:

"Earthworm castings are not a big deal for homeowners, but for golf
courses they pose a huge problem. Think about putting on a bumpy green.
Golf course superintendents take this problem seriously and have more
control options. One common practice is to lightly topdress the turf
area with sand. SAND IS AN IRRITANT TO EARTHWORMS AND PREVENTS THEM FROM
COMING INTO THE AREA. I spoke with Pam Sherratt, an Ohio State
University sports turf specialist, who said that several years ago in
England they used to topdress the greens with a mixture of ground glass
and sand." [Emphasis added.]

So, unless the OP wants a super-high-maintenance putting green for a
lawn, sand sounds like a rather bad idea. I think he's wisely choosing
to do what the folks who actually analyzed his soil recommended.