I also tought of putting a WB on a take-down recurve, but more experienced archers here told me this is a bad choice. You'd better use something simple - a spring rest or even one of those cheap plastic rests which are glued on the bow (i have one on my bow and it works well). By the way it's quite strange that your bow's rest hole isn't threaded - the riser is from a compound bow and it should have a thread to accept all kinds of arrow rests.
2008 Martin MOAB - 45-60#, set at about 51-53# / 55#" Perfect Line" compound/ 55# Mongol horsebow/ 45# "Perfect Line" takedown recurve/ 45# Bearpaw Grizzly hunter recurve/ 55# Samick Longbow Cheetah ... and several homemade bows