After lookng at this thing a few times, it just doesn't look like what I see. Maybe because the camera is located where it is. Acrylic seems to be wetter than I notice when doing the job. Also there seems to be a large pile of powder building up on the bench right under the work. That is an optical situation. It looks like more than it really is.
And the acrylic powder that flies out of the powder container, geeze,
never noticed that before. It is getting drawn right toward the vacuum hole, which is right under the camera.
I like to make the acrylic just slightly thicker than a finished appliance when possible. It takes more time to do, but it saves lots of time grinding down excess acrylic. Which is also where, if you appliance is to thick, you will distort the appliance with heat and the flexing that happens upon grinding.
Secondary is the fact that using less acrylic, saves your over head for acrylic. Not in a huge way, but over a year it sure makes a difference.
Really, time spent grinding acrylic that has not been S&Ped carefully to the correct thickness and distal relation, is a real issue for your income.