Cautionary note - this is the internet and everyone including me is guessing. Proceed with caution.
Yes and Yes to your questions. You might want to consider posting this in the "ask the boot guys" forum but I'll give you my thoughts on trouble shooting this down.
First the foot bed. Part of the reason for the foot bed is to get your ankle aligned. This is especially helpful for people with flat feet. My daughter has very flat feet and is in an A frame without foot beds and riding her inside edges. Mainly to prevent the pain at the ankle bone. Anything you do with the boot is wasted (my opinion) unless the ankle is aligned. Some people don't use/need foot beds and they are either blessed with great alignment of have found a way to compensate. Most fitters start with the foot bed and work their way up and out from there.
I'm a little confused about why you took the foot bed out. You said your one foot was smaller and you took the foot bed out so there would be more room. Did you mean that foot was slightly too big for the boot? If that is the case, a fitter can cure that while using the custom foot bed.
Once the boots are correct and aligned (cuff alignment checked and boot sole canting checked), go ski and bring duct tape. If your inside edges are still catching (might be less, might be one, could be none), first check your stance. Are your feet in or outside of your hips? If outside, move them closer together. Some folks use the jump up and down method to find out the correct width. Easy to do as your feet will come naturally under your hips unless you try to force it.
If the stance is correct and it is still happening, break out the duct tape. Put about 4 or 5 narrow strips stacked on the outside edge of your binding where the boot sole touches it. The strips should be 1/8 to 1/4 " wide and about 1/8" in from the edge. This will push the outside edge down. You can also try putting a folded trail map or something at the top of your boot cuff to push your leg in the direction you need the boot/ski to move. I've never done this method though so I'm not sure how it will work. I believe in your case you would put the shim on the inside cuff to push your leg and cuff to the outside to get the inside edge up and outside edge down.
Also, don't look at your feet to see what is happening, this causes your butt to move back and changes your stance. Stand tall and look down hill.
You should also have someone watch you ski and preferably someone that understand alignment and stance. This can be especially helpful if a fitter checks you out and you're good to go but you still have an issue. Could be a technique thing and you just need to narrow your stance. I'm guessing at some of this as I have seen you ski.
Have fun and happy hunting,
Thanks for the informative post. By the way yes my feet are very flat!
I took out the custom foot bed because within one run the arch of my foot would really hurt. Then my toes would get cold and numb, presumably because it was cutting of my blood supply. Taking the foot bed out and replacing it with the original, flat one has actually helped with the pain. It feels less tight. Maybe just the right hand side foot bed was done badly? Its worth mentioning, currently with the custom foot bed still in the other foot feels perfect but it is like half a size smaller. With the problem foot, when the second down buckle is on loosely my toes touch the end of the boot and get numb and cold quickly and when i do it tightly it reduces this but the pain intensifies! Can't win!
I generally ski with my feet inside my hips.
By the way the second part of today I skied on my original volkle tiger sharks and didn't really notice any catching. But I presume this could be due the the fact that my tiger sharks are a lot slimmer than my mosquitos and therefor the effect would be less pronounced?
Yes, it could cause your foot without the custom foot bed to pronate (collapse to the inside at your heel), I'm not a boot fitting expert...but I know some:rolleyes . It is noteworthy that you're having problems with BOTH inside edges though. Did you get these boots new with the skis? Which brand and model are they? If you got them new, it could be a canting issue for sure. If you've had these boots with other skis, then I would suspect a tuning issue with the skis, in which case I would recommend having a shop do full tune on them (edges and wax).
hope this helps
The boots are 3 years old Solomon pro falcons 120 flex which I had reduced down to like a 95 flex as during the last season I did my shins got so bruised I couldn't ski. These boots really have caused me so many problems but they were expensive and if possible I want to make them work!
When they are on should skis that are within a shoulders width sit perfectly flat to a solid floor? Or should they sit in a slight v shape? Mine definitely have a v even when close together.
Thanks for everyone's input by the way, I'm taking it all in!