Sorry Nev and Brett. I think I didn't explain myself well.
The advance curve is a gradual advance from tickover to about 3K rpm so it takes into account of the engine speed and retards and advances with rpm like the springs in a mechanical ad/retard unit, but unlike springs which get weak with usage, the new BT-H will remain constant with no wearing parts.
I did tests on some std ad/retard units and some springs were so weak after time full advance was at just over tickover 1200 revs or so.
We have many classic trials bikes fitted with the mags and this is where the ad/retard curve shine through.
All my bikes are old and use my mags (except my 30 year old BM boxer) singles, twins and my V twins. All start instantly and perform well through the range.
Most of the mags I sold went onto road bikes, some on record breakers like 1600cc mega tuned twin spark Vincents with no problems so theres plenty of power available to power most engines from Manxes to VB Ariels and they all are improved over the original magneto. So although I am not installing to much "excitement" in you Brett they do what it says on the tin and offers an alternative to other units which are on the market.
I do agree guys, they are expensive and as a customer I would have to think long and hard at a purchase. I believe Peter has just put the up a little. The first price rise in almost 10 years. However as I used to say to folks. There are other products on the market which you will get the same end result BUT you will need power to run them unlike the new BT-H so suggested they buy something else if there funds do not extend to a new BT-H. I was never into the hard sell, I just told people what I did and what it costs and if I thought I could help them with there original unit I would and save them money. At the end of the day I just love my old bikes and want others to enjoy them without to much hassle.
To your original questions Brett.
I think somebody told me some time ago the original BT-H TT mags had balanced armatures and higher spec windings and condensers. I suppose this sounds logical.
The output, as I said before, is simalar on the new units to the old, but unlike the old units the new ones should not detiorate
The curve I use suits most old bikes. I do have two different cdi units so there is some adjustment but after thousands of miles of testing and experiments on so many engines with different state of tuning led us to what we have.
As for tricks, We have done quite a lot of dyno work and one well known dyno guy asked why we run such large plug gaps, at the time about 35 thou, although with surface discharge plugs this went to almost 100 thou.
He said he never ran any more than about .007 - .010" and as long as the engine is in good fettle he has had no problem with plug oiling or loss of torque or BHP.
It also uses less voltage to jump the gap so win win. Since then I just recommended .018" plug gap which is std magneto.
Hope this answers your original question Brett. I don't want to fall out with people or argue and as the company does not belong to me any more I have no say in the running. Peter the new owner is a good guy and I feel it is in good hands.
Keep your knees in the breeze Tony