Peter,
We have talked about lightning protection for the R22 for years. The  general 
consensus is that there is no right or wrong way to protect the Rhodes.  I 
don't know of any Rhodes owners that have lightning protection. Reason being  
that we don't make a very good target. We don't have much metal in the keel and  
the mast is step mounted, not keel mounted. 
Since it is that time of year again, I'm sure someone will jump on this and  
the discussion will start all over again. My policy is to stay as far away 
from  lightning as I can. It scares the hell out of me, especially on a boat, any 
 boat.
 
Rummy