Hey there, the example I gave in post 9 of this thread was just a suggestion I gave the OP if he had freeplays at two books, plus if he has a funded account at Matchbook, but keep in mind he stipulated capital preservation was a very high priority.
There is no need to use an arbitrage calculator that I am aware of. The return of 76.5% in that example is guaranteed minimum even if you can't find a difference in spread/total in game 1 between the 2 books. Obviously the larger a difference you can find for that first game, the higher your average return overall can be, maybe as high as 80%. I suppose you could use the calculator to find out which game you'd be better off trying to middle/side if you have a choice, whether a difference between 3 and 3.5 (football game) between the 2 books is better than a difference between a spread of 9 and 10 between the 2 books.
If you only have a freeplay at one book though and you are limited to +200 dogs and 3 game parlays, and you are not uptight about going through some lengthy losing streaks, then you are probably best off splitting your freeplay into small bets and playing lots of 3 game parlays. If all your parlays are at 6-1 odds, you would expect to get back 75% return for your freeplay in the long run (on average one parlay hits every 8 attempts, betting $10 eight times for an outlay of $80 in freeplays, cashing $60 one time in eight). Of course ALL the winnings will be subject to the book's rollover requirements.
If the arbitrage calcultor helps in using freeplays in some other way, I am not aware of how, probably some sharps here who do know.
(Btw thanks for the offer, no need to send points)