Right time to explain things badly. The RP23 has pre/factory set velocity (compression) and rebound settings.
For velocity/compression do the stickers show Low-medium-fast velocity shaft speed due to leverage ratio, for example 2:1 would be fast, 2.5:1 medium and 3:1 slow for a given frame travel. As a result the 2:1 ratio needs less compression damping and the 3:1 ratio needs more damping as it has to dissipate the energy over a shorter distance. Giving: Low is high compression - medium is medium - fast is low compression.
Or is it actually compression tune and not velocity so Low-medium-firm compression damping? In which case why call it velocity tune?
For rebound is it low-medium-fast rebound velocity or low-medium-firm rebound damping?
Can't work this out and could do with a new shock. I could just go med-med but where is the fun in that.
If i was you, I'd order the shock from a suspesnion company, so they'd tune it properly for you and the bike, and you ca't order the wrong tune.
Well you say that but they just supply medium settings as per my house-mates phone calls the other day. Mojo said if you buy it from them and its totally wrong they will take it back and change it for free, but not up front.
Have you tried Loco Tuning yet?
I can't say for sure, but I would be surprised if different stroke shocks with the same 'tune' had different shim configurations.
So your suggestion of needing a lower tune for a lower leverage ratio bike is probably correct.
I may try and get hold of Loco tomorrow and see if he can shed some light on it, but any opinion/views welcome.
Dunno if this sheds some light on your question, but I had a hl five spot with 125 travel and a 190x50 shock, when I ran standard rockers with a 2.5-1 leverage ratio a medium/medium tune was perfect, but when I got some push 5.75 inch travel rockers I had to go to a high/medium tune to get it to feel right,
When I tried the H/M tuned shock with the standard rockers it felt dead and not very responsive, and when I tried the M/M tune on the push rockers it blew through the travel riding off a kerb
So I'd say the higher the leverage ratio the higher the compression tune, also if your a big lad running high shock pressures or higher weight springs then you might need a higher tune on compression and rebound..
Call loco tf or mojo tell them what bike a bit about you (nothing too personal) and a bit about how you ride. Hand over cc number and get the right thing a few days later.