@Michael Kellough Typically (and for this first panel), I used 6mm dominos - but if it's really just for alignment, I could use 4 or 5mm, right?
@jeffinsgf - I just came across that stand and printed it the other day. This is the first time using it and I really like it. This version holds the bottle upright and will close the nozzle. Fantastic. It does not re-open it when pulling it out - just closes. Printed in PLA on Bambu P1S.
With nice flat nominal 3/4” stock I use 5mm Dominos. If the stock isn’t nicely flat and a little torque will/might make it flatter (requiring less sanding) I’ll use 6mm tenons in the area that needs help.