I turned and assembled a PSI brand Cassic Elite fountain pen. The problem is now the wood has cracked down the side and needs to be replaced. I have tried to use HF punches and no luck. When I use one to fit in one side it slides all the way through and will not catch. The fittings are exactly the same size on each side of the blank and I cannot get one to work. Any ideas would be appreciated. Hope I made sense. Thanks