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Hello, my COMCO MB-1000 has been out of commission for a while now. The abrasive flow started getting too weak and eventually it just sputtered out and now nothing comes out the nozzle. I need to get it up and running again so I asked around and the modulator may be at fault. I had replaced it years ago and apparently COMCO would rather sell me another new modulator than a part. All the parts look pristine except for the delrin washer at #2 on the diagram. It was glued on and cracked, so when I picked at it, it came off in 2 parts. I got a replacement at the hardware store and shaped it to almost exactly the size and shape of the original, glued it on with E3000, let it dry for a day, replaced the O ring just because, reassembled the modulator. After putting everything back together, I flick the switch and no change. It is definitely drawing media from the tank, when I purge it, plenty comes out the purge tube and some out of the handpiece. Sometimes there is a second of weak flow from the handpiece when I turn it on. The tank appears to be sealed, I can't push the flap down. Should I be looking somewhere else? There are no obvious cracked tubes or bad fittings (I checked all of them) etc.

Hi, I am looking to buy a good MicroBlasting unit and need some expert advises. I know the prices of a good unit can go way over 5000$ and want some advises before spending that much. The main fossils I am working on are Trilobites and Echinoderms. Here is the 3 best units I have looked at so far: Crystal Mark: Swamblaster MV-2 Comco: Microblaster Comco: Accuflo Any Other Quality Micro Blasting Unit suggestion? Anyone out there using one of those unit and who can tell me how it goes? Thank you to all preparation experts for your time! Bobby