You can experiment "on snow" by placing layers of tape (duct) or pre cut shims on the binding toe pad and heel pad to simulate canting the sole. Try to place a few strips first (2 to 4) on the sole of the boot aligned to the inside (medial) side. If you are in fact "undercanted", this would be the area to start with. What you are trying to create is a slight upward push at the area of where the tape is placed. This creates an angle at the boot sole, pushing the inside (medial) side of the boot upward. The outside (lateral) side will stay in contact with the binding toe pad. Try not to exceed 8 layers of tape because you'll start to reduce proper binding function. This is pure experimentation and can produce exciting and surprising results. I would experiment first on easy to moderate slopes that you are familiar with.