Originally Posted by
Somerset Val
...............I need to teach it to my group after Easter but have never done any other than a small sample............
Sounds like the biggest tip would be to do a lot of practice by yourself between now and April.
That way you can find out what can go wrong/right ... and understand the process.
Otherwise, it could be very intimidating trying to teach others, to say the least embarrassing,
if you really are not proficient with the technique yourself.
Good Luck!