Roger,
I'm so glad to hear that it is going ahead again.
Are we committed to the same venue or are you looking at alternatives in another part of the country ?
I think that a topic of Home Haemodialysis installations with a group of say 4-5 speakers with say 10-15 minutes each and then a Q&A giving an overview of how they do it might help new technicians without prior experience decide on their format.
www.healthtec.co.uk