On Wed, 14 Jun 2017 08:49:40 +1000, Trevor Wilson wrote:

**OK. I'll trade your 7 years with my 40 years professionally servicing
electronic equipment. And yes, I have a (filtered) air line into my
workshop. However, a vac is vastly more preferable and much safer. I do
use air, very sparingly, when required.

Yeah, air is so expensive you gotta use it sparingly hehehe!
The one caveat I would add about blasting boards with (clean) compressed
air is that you *gotta* do it outdoors for all sorts of reasons I can't
be assed to go into here.