took my mate on a job, never carpet cleaned in his life, i wanted him to bonnet a comm after i'd TM'ed it, told him to come to our house and practice with the RX for a bit till he got used to it, stuck him in a small hallway at our house and switched it on, he was turning on a sixpence within 30 seconds.
youve either got it or you haven't.

can in one hand and a burger in the other when i'm doing it, just rest it on me numpty

derek