Re: diy aircon recharge
like i said, i've no idea how good it is, i didn't even read the instructions fully.
i have also seen mac tools selling a similar thing, it's a hand held trigger type device which as a small can of the stuff screwed into the bottom.
i am guessing that these systems are only meant to be used as a top up on an already sound system.
the cans are a bit on the small side so i doubt if they would fully fill the system anyway & of course they may not have the oil.
if mac tools are also selling this system then surely it should be ok to use just as a top up once a year ?