Glad to hear the panel straightened out. Masonsailor's idea seems to have done the trick, and I think it is probably the only way to take care of any gaps in the joints that result from a situation where jointing leaves a face and edge that are not perpendicular.
I just wanted to follow up on your reference to Shopsmith's double bar clamps. I have done a number of multi-board panels using them, and I really like the way they work. What I have found to be helpful is to do the glue up in sections rather than all at once. If the panel is four boards, for example, I glue up two sets of two and then do the full panel in a third glue up. Each time making sure the two bar clamps are snugged down to the faces of the boards. And sometimes I add a caul to the very ends of the boards to be certain they are in the same plane as the rest of the panel. I have never had to do it as a regular thing, but setting dowels or biscuits along the edges of each board will also help greatly with the alignment.
Mark 5 of various vintages, Mini with reversing motor, bs, dc3300, jointer, increaser, decreaser