my # 1 fly. if you euro nymph I would extremely suggest offering this a shot. Make sure to keep your covers tight to keep this thing dropping through the water column. Hope this works for you!
Products list
hook – ahrex fw550 sz. 8
beads – 4mm firehole stone in mounds and a gold slotted tungsten bead
tail – brown duck biot
body – incredible possum golden stone dub
rib – brown vinyl midget rib
wingcase – turkey tail
legs – brown duck biot