Well done on even noticing that MrSlow! Most only wonder why their leg hurts so much after spirited cornering sessions. You noticed it's not very comfortable having so much weight on the inside peg hey?
The ability to get your footpeg weight setup such that it's comfortable depends on a few things, but by and large the most important reason is the ability for you to "lock on" to your motorcycle effectively.
As you've not been to the school yet I can't relate you to drills that are relevant (necessary) to get it perfect, but we'll take a stepped approach to see if you can get a little closer to achieving your aim of being comfortable.
So with that in mind, bear with me, we'll be talking about holding onto the bike, we'll talk about the bars, the legs, the tank even your butt, but it's all relevant to our end goal OK!
In the past on this forum we've spoke of the importance of being relaxed on the bars, do you find when your weight is heavy on the inside peg you might also be holding a little tight on the bars? If we can't hold onto the bike using the bars, what can we hold on with?
No doubt you've watch John Wayne at work on his horse in a good western He's plodding along on his horse, holding a thin leather strap in his hands... he isn't holding onto the horse using that leather strap, so what's he holding on with? His legs!
Can we do the same on a bike? Hell yes! But we might be making life difficult for ourselves if we try to hold on incorrectly with our legs - this is where being at a school REALLY helps, we can position you such that you can then feel the difference in being locked on, versus not.... and the difference in seating positions might be less than an inch!
Consider this, if we want to hold onto the bike using our legs in the turns, we really want the strongest muscle in our legs to be used - otherwise it'll be hard work... which muscle then... the quad's (look them up) they're the puppies to use, idea:
Try something with your bike on stands in the garage, get yourself jammed up against the tank and hang your butt far far off the seat, do you feel stable? imagine hitting bumps? Notice you can't let go of the bars without considerable abs, diaphragm and back muscle effort! Not good... also check out how far you can comfortably get your inside knee out, not much! Note how the further off the seat you get, the more you twist away from the turn (in towards the bike).... so where's that leave the heavier half of you? Over the tank - which negates all the weight you've attempted to put low and to the inside of the turn.
Added up you can be putting bar inputs in and tensing so many muscles that should be relaxed, using more lean than necessary and potentially going slower due to lean and not feeling stable on the bike! Not good.
Now instead of hanging a full butt cheek off just move somewhere between one to three inches to the side when setting up for the corner... basically very little, see if this lets your outside knee (from the knee to halfway towards the groin) come in contact with the tank more as this is where you will be holding on best (the stronger Quad muscles). If all your contact is close to the groin (abductors) then you wont be able to maintain that pressure for long, best to use the quads which are far more powerful.
Picture that your outside knee can be rivetted into the tank...to get to that position most people need to move a little back in the seat, not so close to the tank, this is where it's important to refine this with a coach in person, as everyone is an individual ("no I'm not!"), now in that position further back from the tank, is it easier to get the upper body lower? can you easily get your knee way further out than before? Does this position give you more room for your arms and potentially for some... the beer gut? Do you feel more stable should you hit bumps? How about how much lighter you can relax on the bars? easier there? Can you last longer at trackdays doing this? with a more stable bike and less lean or more speed with your knee down earlier (big goal for some)? Most importantly or you, how is your footpeg weight? A bit better?
Anyway, this is a really difficult thing to get right via text... best to get this right with a CSS coach on the day, but give yourself a treat and try it out in the garage, you might well be surprised. Most things that help make us go faster are simple changes, which just doesn't seem right considering if they're simple changes then we must be stupid for not knowing to do that before???? i.e. we want things to be harder than they really are.. crazy huh.