Hmm, did you reinforce the cracked area with fiberglass fabric? It is
needed to provide structural strength.

No. We're talking about an area the size and thickness of two quarters, in
spots.

I might try laying in a few strands (if I ever try this again), just to see
if it helps. Maybe I'll try embedding a couple of reinforcing strands
taken from a piece of heavy duty packing tape...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"