Yeah, this would be a good formula. I would enjoy the idea of: 6 weeks prior the Kong Off, people needs to put a X game to participate to the Kong Off.
However, this can be a little bit awkward, depending on the situation.
Like personally, if I don't have the record by then, and if for some reason I can't play on my arcade machine (or even on MAME), and I end up not getting invited because of that, even if I did a 1.15m+ score few months before, I wouldn't be very happy! lol.
Things like that could happen to everyone. For example, If something bad happens in your life (family problems/work/etc), and you don't want to play Donkey Kong because of that (but still want to go play at the Kong Off 3), but end up not getting invited because some sh*t happened in your life and you didn't put a score good enough to participate to the Kong Off 3, even if your personal best is very high, and even if you ranked very high at the last Kong Off's... that would be disappointing.
Obviously, I don't think this kind of thing will happen to someone, but if something like that happens (someone's DK machine breaks, if a MAME player's computer breaks and he can't play on MAME before the Kong Off, you are too busy at work, etc), then I think we would need to take into consideration that.
For example, if Hank doesn't have the record before the Kong Off 3, and he end up not having the energy/time to play enough Donkey Kong to qualify 6 weeks prior the Kong Off 3, then he would go to the Kong Off 3, without participating, just because " he didn't qualify before the Kong Off 3 " despite the fact that he broke the DK record 5 times, was the champion for 2 years, and was the champion in the first Kong Off. That just can't happen, lol. That would be the most ironic thing that could ever happen at the Kong Off, lol.
Personally, if I couldn't participate because I didn't qualify for one of these reasons, it would be way too awkward for me and I would probably not come to the Kong Off.
Ultimately, I think that this formula would be a very good formula. But since DK is a very close and friendly community, we will never be able to apply this formula if, for example, Dean, Hank, me (I don't want to sound cocky by saying myself though!), can't officially qualify because of one of the reasons mentioned above.
Hank: If I can't qualify, please, save my honor, and do a shirtless entrance... I have to keep the tradition! lol.