Hi Col,
dunno .. maybe its what it promised ( or what i thought it would do) compared to what it has, it always has felt like a weak link and combined with the lack of power around 1500rpm together with no one has been able to decipher the ignition curves. I would like to have something in my spares that I know will work so getting the original redone seems logical to me.
I also had to have the electronic one serviced after a particular deep wading experience which cost almost as much as getting a new one, moral of the tale is that you can't just dry these out as all the parts are replaced with a PCB and a chip, i might have fared better with an old school one as I could have just swiped the points and driven off instead of having to get recovered ..
Simon