I bought the sprayer this summer but never really had a chance to try it out until now.  I downloaded the manual for the Midtech controller, but it doesn't seem to have anything in there for setting the reaction speed of the flow controller.

Also when I first tried it I couldn't get more than about 30psi out of it, so I adjusted the Flow control valve so it will deadhead around 90psi, it seemed odd to me that it would have been that far out of adjustment. 

On a side note: The ARC6000 has firmware 2.01 in it.  The manual I found online is for firmware 2.03 but there doesn't seem to be any place to download firmware 2.03, does anyone know where I could get newer firmware?