Excellent information, now I'll know what *not* to mess with.
Trading a hundred dollar bill for the speedcal looks better and better every time I think about it!
Plus, it seems through this board, I've found someone who can do the labour on the gearswap in my IRS for $200, so it's a no-lose situation!
Out of curiositiy, would it be any less expensive just to sell a unit that plugged in that was programmed for a specific combination without having any adjustability? (i.e. 4.30:1 gears, 26" tires, etc. etc.) Or, does that really just defeat your original intention of having a one-part-for-all scenario?
FWIW, I wasn't trying to downplay your product's innovation, I was just curious about how it functioned, which you answered quite professionaly. Most manufacturers and designers wouldn't say anything. Thanks again, and you can expect my business!