The stock horizontal stab weighed .8 oz my replacement weighed in at 1 ounce without sheathing, but with carbon fiber spars joined into the balsa root and rib arrangement. The holes you see in the photo attached, were to drip ca into the wood/carbon fiber joint to bond them and harden the balsa contact surfaces. The horizontal stab like this was much more rigid and resisted twisting much better than the stock assembly. My built up assembly was than sanded to a taper at the wingtip and will then be sheathed with 1/32 inch balsa.