@Earl, the clamps are a Swedish patented invention that produce pressure both vertically and horizontally so if the clamps are correctly mounted and aligned they will aid you in producing a flat surface (if your lumber is flat from the beginning that is ;-)) they are called PLANO i have no clue if there is a distributor in the US. John Ormsby (in this thread) might know?
@Chris, Thank you very much for your nice words!
@Willly, Thanks! Yes it always hurts putting finish on great lumber. I have a very good supplier of straight grain pine.
@John, Thanks! Yeah PLANO is really a good investment in your shop!