My $30 figure was from research. I found one tach for $20, one for $25, two for $28, and one for $46 Which gives an average of $29.40

Ok, I inflated it 60 cents, but don't forget about tax and/or shipping.

My point is, there are a lot of people out there who are afraid of buying their first 4-stroke because of all of the horror stories they hear about them being finiky, or difficult to tune or constantly in need of valve adjustments. If they knew how little difference there was between the two, they wouldn't hesitate to get one and they would be enjoying a whole new aspect to the sport.

Will it require learning a few things? Maybe, but nothing they can't learn in a few minutes. Certainly nothing worth not buying the engine over.