Thanks for your feedback Snowolf
if your right knee is weaker and has limited range of motion and keeping more weight on it causes pain, tweak your equipment a little to give you an advantage. Move both bindings forward 1 insert hole and go ride and see if you notice a difference. This will shift your weight forward without you having to put the extra strain on that knee. Understand though this is a double edged sword and when you get into powder or sticky snow, you are going to have to really shift your weight back onto your left leg.
It is certainly weaker, range of motion is 95% that of the left leg and there is not much pain. The main issue is subconsciously taking weight off it due to fatigue (due to less strength). I will do as you suggest and go to +18 / -9...I was thinking of doing this anyway.
One thing that has helped her and it will help you too is to start working on your basic cross over carved turns. These are very basic carved turns that can be done without any knee bend at all as you are no longer using front foot steering and board twist. You are simply inclining your entire body over each edge to use tilt alone to initiate your turns by letting the sidecut do all of the work.
I looked this up, and I believe I have been doing these turns without even realising it. Quite often on a steeper run I will do these turns and carve C's down the mountain, sometimes I will initiate a little bit with ankles but take over with body position over the edge. When I have the strength I do more S's with heavy use of my ankles.
Here are some other things that can help with knee pain like this; depending on your particular situation. Canted footbeds on the bindings often help. I get MCL fatigue and these have helped. Softer footbeds on the binding like the K2 Harshmellow or even softer footbeds for the boot. Both options help reduce impact energy travelling from the foot up through the leg to the knee. In addition, stance angles and widths can play a major role.
Sweet, I will look into these, I particularly have in mind something like shred soles (boot footbed) which I saw online so boot sole will be my first port of call I think when I'm in a shop next, particularly because I mentioned slight movement in the shoe.
On the stance width, I was set up by a shop. Setback is dead centre and stance is middle of the road. Is there anything I should consider here?