I saw someone on ebay offering hand-made cherry tonearms now long ago....I haven't seen him in awhile. They looked nice.
Those Grado wood tonearms are much sought after.
Joseph (and now John, his nephew) are great believers in underdamping cartidges for best sound...they use wood as their natural damping agents instead of rubber (synthetic or otherwise) internal in the cartridge. So your
Grado Blue should sound nice with the Grado woodie tonearm of yore.
Personally, I think fluid or electronic damping of your tonearm is a premium step for getting
all that the Grado's have to offer. I'm not sure wood,
alone, either as cartridge body of tonearm choice will critically damp the powerful Grado's adequately...especially the newer Prestige cartridges (like the Blue) which are a helluva' lot more dynamic than the Z, G or other series proceeding it.
Still, Dave the Forum 'Ho

, I think it'll sound pretty sweet on your ROK