Great food processor,
skillet! I use mine all the time, though I never use it for weighing things, as I'm adding - definitely too heavy.
Here are some tips, that I have done to mine, to make them work better. First, both the basalt molcajete, with 3 feet, and the granite mortar, with the flat base, I put silicone rubber on, to keep them from sliding on the counter, as well as preventing scratching. The molcajete, with the 3 feet, I just put a dab of silicone seal on each foot(after cleaning with acetone), then put a piece of waxed paper over each of them, then put a piece of scrap plexiglass over it, letting the weight squeeze it down slightly, to just about 1/8" thick. Then remove the plexiglass, let the silicone seal cure several days, and pull the waxed paper off - it comes off fairly easily; any that doesn't come off, rub off with water.
The granite mortar, with a broad base, I clean with acetone, then I spread the silicone seal about 1/8" thick, as evenly as possible, using something like an old gift card, then covered with WP, a piece of plexiglass, and pressed gently, to get it as flat as possible. Take the plexiglass away, and let it cure about a week - by this time, it should be totally firm. Then remove the WP, rubbing it off with water, if necessary.
Silicone feet on molcajete, and silicone pad on granite mortar. by
pepperhead212, on Flickr
Another thing that I did with the basalt molcajete, was to seal it. These things can be very porous, and some of the rock breaks away when first used - they tell you to grind some rice in it, throw it away, and grind some more, until no more of that "black sand" is in there. What I sealed it with was some food grade, water based polyurethane amazing how much soaked in the first time! I let it cure several days, then did it again, and then a third time, with little soaking in the third time, so I blotted it off. I let it cure for a couple of weeks, and that was it. This makes it easy to clean, with little of those aromas staying in the stone.