I'm working on the excellent Boaz resin flatcar kits and wanted to get some feedback on making consistently straight cuts for the styrene channel material for the stake pockets. I use an NWSL Chopper and it seems no matter what I do, the blade deflects when I make a cut and the pieces are not straight. Is there some better technique or am I missing some procedure using the Chopper. This is a problem for me using both the older model with the hardboard base or the newer models with the plastic mat base.