If I had 20 quid to spare I'd sooner spend it on decent tools. Not that £20 gets much decent these days.
I have spent a sleepless night thinking about the guy BAS brought our attention to. What happened to the testicle and scrotum that were left in the machine? from the sounds of things he didn't realise he had lost it:O. So if you are offered any second hand equipment from the US check it out first I can't believe the won't let me say SCR0TUM
Interesting that they've brought this thing out on a couple of pokey little 10in saws, how'd it work on a gurt great Wadkin, I wonder? My experience of electronics on industrial kit is that sooner or later it all goes foobah, and then where are you? Minus a todger!