I have a qusetion about the middle deckbeam in my Chesapeake double kit. Having planed the sheer clamps and got to a point of wanting to install the deck soon I have become increasingly disturbed by the ill fit of the middle "plywood deckbeam". I checked all the parts against the plans prior to installation, and triple checked the placement before installing. It now seems there will be a clear gap between the underside of the hull and the top of the deckbeam. I cant plane further into the sides to make it fit as I have already planed quite far enough, and it would introduce a buckle in the deck if I tried to make it attach to thi beam. Is this normal? Should I build it up with some scrap ply strips?