Quote Originally Posted by beacon14 View Post

I also use the two motors to cut solid wood parts down to just a few inches square on a single 24 x 24 zone by nesting them against an "L" shaped fence which is butted to the table stops, covering the rest of the zone with 1/4" one-sided MDF (or anything non-porous), and taping all the seams with blue masking tape..

Thanks. Based on this recommendation, I am going with a 5 zone plenum, rather than 4. I am glad that for whatever reason I bought an extra knife valve. I will add a 24x24 zone.