Although I can't find too many freedivers up here in Wisconsin,
we do have tech and trimix divers comming out of our ears. It will be no problem to assemble a group of safety divers who are willing to go far deeper than I want to try it.
I do most of my freediving on the wrecks out on the great lakes while we are running our normal dive charters. I do my warm-ups while people start their dives and I get to my deeper depths when they come back to deco. This way I have a lot of people to watch me when I get to those critical last few meters. After the newbies get back on board I grab my scooter and go retrieve all of their lost gear for them.
Many of the regulars are my friends who range from rebreather divers to trimix instructors. I feel totaly comfortable with all of them. The sled would be a fun diversion for all involved. Maybe it would even drum up some interst for freediving in these parts.
I also want to repeat that I am not looking to break any records. It just sounds like a fun way to have a good time.
I know that Kirk talked about variable ballast training to get comfortable with deeper depths during the clinic- we just never got time to prcatice it.
Jon