Hi Pete. Tigger has been on my 'to do' list for quite a while as well. What is it about tigers, eh?
No, I haven't managed to finish Dennis's WoW one yet. Fingers are still way too shaky. Did you ever get to finish your one off? I imagine getting that last leg in place was a challenge? I started mine again, working from the tail forward to the head, but I only got as far as the waist before the chemo took my fingers out of commission.
I have found that filling the bigger figures with builder's foam filler makes them quite rigid, and they survive handling by the Rug-Rats quite well. It works well in smaller figures too, but you need to fill quite a few together to avoid too much wastage. I've now invested in a Pro gun, with cartridges, which is much easier to control for small amounts, and can be easily cleaned out and reused.