Combiner wars Devistator HELP please.

Love the forum, but I just made an ID to ask this question. I just got mine last week, and on my Hook, it is developing major stress lines on the small round tab that holds his legs together in head/crane forms. Anyone else have such and issue, and are there any suggestions as to fixing it? I currently have a R/C helicopter screw in there that is 1/32 diameter and about 3/16 long. However, it is not long enough. I have tried metal pins from hinges, computer screws, and a bunch of other things. Anyone have a similar issue or any suggestions as to a potential fix?
Thanks,
Gundamman
Thanks,
Gundamman