Haven't used it yet currier for 1mm only 0.5mm. It doesn't atomise enough for the smallness of the grain, I mean we're talking about the fineness of something like table salt. It goes on like 1mm tyrolean. The 1mm might be in it's zone though. This whole spraying lark is so trial & error. I mentioned before blones suggested piggybacking the Refina with the onboard comp. basically have the air coming from the machine and the Refina, into a 2to1 coupler then to your gun. It might even mean you can control the machine from the air switch on the gun. Ian said it didn't work with the lk402 as there was too much air. There's a chance it might work as the refinas a 100l or so less output so might not confuse the machine?!? Trial & error gone mad lol