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Well this year I've started collecting items to begin preparing crabs and trilobites. Obviously the crab nodules are a bit tougher than the trilobites so I'll need to take that into consideration. I recently purchased a CP9361 for a pretty good deal and also have a decent microscope with 20x magnification. I'll build an air cabinet for micro blasting later and then pickup a medium hopper and micro sand blaster for trilobites eventually but I'm going to start off preparing crab nodules which is why I went for the CP9361. Also probably going to pickup a long 2" tungsten point tip for the CP9361 as their stock tip isn't that good (or so I've heard). I work at my nearby museum preparing a Barosaurus and they use everything from the ARO (couldn't find one of those), ME9100, Micro Jacks, and the CP9361. The museum curator advised going with the CP because they are cheaper and he said he's never had one break down on him and he's had a couple ME9100 break down. So now I have to look ahead and decide what compressor to get! I'll probably be preparing fossils for no more than 2-3 hours at a time but want to be prepared just in case. Everyone who is experienced at preparing on this forum suggests prepping for as long as possible to avoid shutting the compressor on and off thereby fluctuating the hardwares air regulation system. A few things to keep in mind when working on fossils for a long time with a compressor as your power source: * Avoid oil lubricated compressors as the oil can leak from your air line to the fossil. * Go with a compressor that outputs at least 90-110 PSI since most scribes operate at this level. Also make sure it outputs at least 2 CFM (cubic feet per minute). Most tools I've observed require about 1 CFM but it's always good to have more in case you want to use your compressor for other things or more heavy duty tools. * Go with a compressor that holds 20 gallons of air or more if you're going to be working on fossils for a while. Here's a couple I had my eye on: 15 Gallon Dewalt: https://www.lowes.ca/air-compressors-kits/dewalt-16-hp-15-gal-200-psi-portable-electric-air-compressor_g1335346.html @Malcolmt didn't you say you had one like this? This one is 15 gallons and I thought you recommended 20 gallons? Thanks. 27 Gallon Dewalt: https://www.homedepot.com/p/DEWALT-27-gal-200-PSI-Portable-Vertical-Electric-Air-Compressor-DXCM271-COM/303655008?MERCH=REC-_-PIPHorizontal2_rr-_-206796177-_-303655008-_-N 20 Gallon Husky: https://www.homedepot.com/p/Husky-20-Gal-175-PSI-Portable-Electric-Air-Compressor-C201H/206189626 10 Gallon California Air Tools: https://www.homedepot.com/p/California-Air-Tools-10-Gal-2-0-HP-Ultra-Quiet-and-Oil-Free-Electric-Air-Compressor-10020C/206644539?MERCH=REC-_-PIPHorizontal2_rr-_-206796177-_-206644539-_-N Probably won't go with 10 gallon as that won't produce enough air for longer preps. As long as the compressor runs continuously for a few hours that should be sufficient. I'm leaning towards the more expensive 27 gallon Dewalt because it has such a good rating and a bigger tank then the 15 gallon Dewalt or 20 gallon Husky. I'm a bit surprised both the 27 and 15 gallon Dewalts are priced the same from two different stores. What are your thoughts here? Obviously I'll get the three year warranty with this unit. Can't skimp on that!
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