Is the gain's "depth of cut" starts from 1/2 of thickness at the end,
and tapers out to 0 depth at approx 1 1/2ft from the end? Width is
constant 1 1/4in.
I will make a router jig.

Bill,

this is really easily done with a bull-nosed hand plane, and it gives you an
excuse to buy a really neat tool !!!

Cheers/The fader
"LABOR SVGIT"