Blimey, who'd have thought a thread about positive v negative earthed electricity and dynamos v alternators would have veered off to discuss the merits (or otherwise) of natural and synthetic *fenestration.
*Apologies for using such a fancy word but I'd never heard of it either 'till yesterday when I had to look it up to solve a crossword clue.

May be my one and only chance to use it!
Fenestration :- The design, construction, or presence of openings in a building.
So.....back to the topic: Seriously, MANY THANKS indeed for all the contributions which have convinced me to go down the negative earth Dynamator route. There's no rush, as my dynamo is coping well with what it has to deal with at the moment (not a lot, in truth, as there's not even a radio) but I'm thinking that if I, or the next owner, want to have some I.C.E. it's going to be so much easier. I might wait 'till I go to the Classic Car Show at the NEC in November. There could be some 'show special offers'.
Just a word or three 'originality' - perhaps when I refer to it, I really mean 'authenticity'. I have posted elsewhere that, personally, I'm not a great fan of over-modifying classic cars of any make/model but I'm generally happy to have improvements in technology such as electronic ignition, electronic fuel pump and my yet-to-be-installed Dynamator that still look authentic but are less likely to breakdown and/or perform better.
My pet hate is alloy or rostyle wheels on a Moggy - just plain wrong, in my opinion. I'm being deliberately facetious here of course, as we all have the absolute right to do whatever we want to our own cars.
I've been out in Derbyshire today on a near 50 mile round trip and my drum brakes, standard 1098cc engine were perfectly adequate. I drive well within the car's capabilities ie: a bit less speed and a bit more space between me and the car in front, when compared to using my Jazz. You'll notice I 'drive' my Moggy and 'use' my Jazz as most modern cars are basically 'point and shoot', with just about everything switching on/off automatically. That's why I love driving my Moggy but if I drift over a white line, rather than a buzzer on the dashboard to tell me, I have to either notice it myself....or wait for my wife to start screaming!
I do agree with the already expressed sentiment that true originality is not physically possible. As soon as petrol is pumped in, the octane rating and overall quality of the fuel (and oil) is much superior to that which was available in the years when most, if not all, of our Moggies were made.
Many thanks again to you all for your advice and technical information...…...and for making it such an interesting and wide-ranging thread.
