I did a small layup tonight (4 pieces) and it's in the bag now. I'll run down there and crank up the pressure, the resin has just started to kick off.
I did notice, as you have mentioned, there are tons of bubbles along the edges of the part under 15" of vac.
I think I can get 25-26" out of the thing, I'm going to go crank it up and see.
I'm a bit worried at the higher settings, as that seems to be where I had the large voids appear on the part.
I WILL FIGURE THIS OUT
