Hey, not that anybody was interested the first time, but I finally got this sorted. Turns out I had the wrong software on it (nowt to do with me - I wouldn't even know how to upgrade it if I wanted to!) and the FETs blew. Or something. I've got a replacement which works, but is MUCH slower than it was!
I'm fed up with this speedo now. I've only had it out twice and not even got my cat out in a race yet! To be honest, I'm a little bit annoyed that a brand new £150 speedo has been replaced with an obviously used one.
Anyway, what would be a good alternative? I hear the Tekins are wiping the board these days? Should I go for one of those instead?