Out of interest, how many people renting from flying clubs/schools do have FM immune kit?
To the best of my knowledge, of the eleven four seaters (3 twins, 8 singles) at the club I fly at, eight (3 twins , 5 singles) have 2 FM immune radios, two have one FM immune radio, and only one has no FM immune radios.
AFAIK none of the two seaters (152's) have any FM immune kit, but they don't really need it.
I've this nagging feeling that the number of FM radios you require depends on whether you have a private or public category C of A, but I'll have to do some digging to confirm that
Brooklands