Sorry if this has been mentioned before and not to put a damper on things as I think this is a good idea and would like to see it happen
But
You would also need a wide range of protective gear (all with the correct kite marking or whatever is in use now)Not cheep as a lot of the cheep ones are not fully marked (even if they are safer than the real ones)
That would mean (for 10 trainees) 10 sets of elbow/knee pads and 10 sets of wrist guards and helmets (as these come in lots of sizes and fit is important) you would probably need 30 sets of various sizes and as we know they do get damaged and one fall can write off a good helmet
I say this because if you put someone on Bocks without all the gear or badly fitting gear no amount of insurance will stop them suing you
Also you can get them to sign a disclaimer (as we do for paintball) but even that is pushed aside in court if you are found to be negligent in safety proceedures and the disclaimer can work against you as the prosecutor will say you knew it was dangerous and still let people do it (for this reason good insurance is needed with the insurers having imput in the safety setup)
All the accidents I have seen and heard of were while learning or trying something new so teaching people to use bocks and advance in the sport is going to have to be very safety orientated
Don't let this put anyone off as it is a good idea but make sure you cover your A** so you don't get stiched up in the long run
Jason