Bought me a Bauer !!!

[mud_diver]

"Doing PP fills on a cylinder that is lined with oil mist is probably not a great way to start"  All my tanks are O2 clean.

"I'd also make sure that I took the appropriate blender course and was trained and certified to dive the mixes that I blended."  Already signed up for gas blender and advanced gas blender, will be taking them soon. also have read Oxyhackers manual on the subject. But I would like to pump some plain old air before taking the class, that's why I asked.

"New or used, what size, stock filtration or upgraded?" Used, Bauer Utilus, 3.8 cfm at 5000 psi. Standard filtration -I bought some new Lawrence Factor x22249 cartridges, will change right away. It is running standard oil, but I may switch to synthetic. I need to find a hyper filter for it for PP blending.

So: How much $ for air sample, how long to get back results, who do I contact to do it?