I have a figment of an idea for a new small business. For lack of a better name, I'll call it: "Lawn Mower Blade Sharpening While 'U Wait" Basically, the idea is this: I come to your home, shop, job site... wherever... I'll even come to the parking lot outside the restaurant where you and/or your crew is doing lunch, and in less time and for less money then you can do it yourself, sharpen your blades and saws. What do you think? Is this something that's needed? Is this something that's already being done? Do you sharpen your stuff, or do you send it out? How do the big companies handle sharpening? Thanks in Advance.