As selfish as this sounds, if you turn your competition onto the production increase that the mini brings, they'll be quick to go buy their own, and there's a lot of fools out there that would start slashing prices because of their newfound capabilities. Its like discovering an awesome marketing technique. Might be best not to blab to much about it.......
The flip side of that coin, is they aren't a secret, and anyone at anytime can go buy one. You cant stop other companies from making wise choices, and it wouldn't be rational to think one could. But, let them do it on their own time, and in the mean time enjoy reaping the benefits of your own boost in production. Another thing you might find, is that you become a little possessive about that mini. Meaning, you want that thing in top order, ready to rock, all the time. You can find ways to milk a few bucks out of it here and there besides your own tree jobs, but the first time you break something on it, on someone elses job, and that thing is out of commission on your upcoming jobs, you will be sour. It will pay you better across the board to keep its use limited to your own high production, not someone elses.