Generally I mill the the thread groove on one the outside strip before I glue up. You can also do it with a router and large bushing on a 1/8" cutter and large bushing as you really only need about a 1/16" depth(you probably already have that figured out). The ghost nets are very nice but the one I like to use is the measure net guide size in their rubber mesh. It is WAY lighter than the typical rubber net, has measuring guide inside the net to 36"(wish I needed that!) and it zips on with a good YKK zipper.Jusy my $.02. Very nicely done though. Really like the bandsaw wave down the middle of the handle.