Geoff
I've sometimes wished my S22 had 3 reefs. In yr position I think I would:-
a) thread up R2 and R3 on the basis that(if you really wanted R1) you could pull down R2 then tie in R1 with lanyards while under canvassed then free off R2.
OR b)just thread up R1 and R3 and settle for being under canvassed but more comfortable with R3 in
I have a cunningham for flattening the main which I have never used in 20 years! I usually heave the boom hard down the goose neck track to harden the luff and I have an outhaul tackle (3 or 4 to 1)with the tail led back under the boom to a cleat within reach.
This seems to work OK and the main is probably the original sail (1976).
Regards Tony Dee Rover