RE: Elec. Advance versus Mech advance
Jeff,
On an electronic ignition with either electronic or mechanical advance, you will see major improvements in ease of hand starting. Both will also idle lower & smother and transition better. There is NO difference in performance and very little difference in weight (a few grams max) between electronic & mechanical. Take your pick. Some like the electronic for less moving parts & some like the mechanical for the adjustability and linear advance.