I swapped out the old maggy on the preunit last night. The old one was starting to give trouble occasionally causing me to miss a day of riding and requiring me to close the gap down to about 16 thou. It’s replacement is a spare I had around and rebuilt by Doug Wood engineering. Inside it’s been rewound, re magnetized and new modern condensers and coils fitted. Doug says they will run all day at 28 thou gap. Well see.