Balancing stabs
I use a prop balancer to balance the stabs. I taped a mixing cup to the leading edge and filled it with lead shot to balance.
I opened up a hole in the leading edge to put the lead shot in. It took 41 grams or 1.4 oz in each stab. I mixed up some 15 min epoxy with the lead shot. Then I pushed the slurry mix into the hole and tapeed it up with packing tape. Then tilt the leading edge down and let it all roll to the front edge. The tape gives a smooth and flush epoxy finish over the hole.
Left side checked.
RIght side checked.