Dear R' Meir,
The guys are holding to the system, and doing well. I think the best proof that it is working is that they couldn't add into their global chazara schedule the mesechtos that we learned in the kollel before starting your system... because they didn't know that material well enough to review it quickly!
I am always happy to host you, but the question is what would you do with the guys this time. They are already sold, so there is no need for a sales pitch. And they are doing what you told them to do, without confusion. Still, if you see toeles, I am in.
B'yedidus,
Leib