If it is the pic on the SYKCO website/orderpage I really can not see any gab, so I too would be very interrested it seeing the picture referred to.

I have a lot of res-c handled knives and on two of them there is a small bulge just where the spine connects with the Res-c. And on one there (one of my 311's I think) there is a slight gab in the same place. None of which has my concerned the slightest bit.
Don't worry, the handle fits perfectly, and there will NEVER be any kind of play or looseness whatsoever.

If the knife is off the exchange, why not just a brand new one from the Yard it self?