Yep, I think we're stuck with at least an interim competition of only a month or so, because that's when we know we'll see each other next for the weigh off. But I hope I can parlay that result into a longer lasting competition.
And it's highly unlikely either of us will embark on irresponsible weight loss tactics. Mainly because we're both too lazy and like to eat too much.
I'm leaning towards a simple "net pounds lost ahead of the other" tactic. This would presumably give the advantage to my dad because he's starting at a higher point and might benefit from newbier gains. Enough of an advantage to at least outweight the age thing, I hope.