More of a reminder for myself, but if someone is interested, I'll be glad to shed more light to the matter.
Reply#31 and around is about problems with the sub-deck plywood. I plastered the wound with sanding filler.
The filler turned out stable and smooth.
Somehow when sanding, however, the wound sank into the plywood. I wasn't able to make the surface even. I reapplied more filler and each time the wound sank again.
TODAY I found out what the problem was. I had attempted to remove the delaminated portion, hence the wound and filler. I had assumed everything around was good and healthy. But it wasn't. It was the surroundings that was rising, not the wound that was sinking
The fix cosists of cutting through the surface of the delaminated plywood and stuff CA into the cut and press.
Now it's solid all around. Later I will apply another filler coat and hopefully have an even deck.
I was adviced to bin the faulty part and make a new one, but here I am still repairing
.
I suspect, I'm going to have to make a new sub-deck in future.
Fortunately, the superstructure is removable, so the module is not too big.