It's been a few years Ruidi, but I was privelaged to spent quite a bit of time online in private setting wiht someone who has reseached these issues in Canada, in a scientific, documented way, and came up with some very interesting solutions. On his advice (I didn't come up with this stuff on my own) and several others as well, I tried the instep pad. first with custom footbeds, then wiht factory footbeds, and last wiht the moszkito footbed. Because the moszkito footbed supports the arch back towards the navicular, it allows some functional movement in the ach as it loads. Feels and seems right to me.
I've been told by a certified pedorthist (not the researcher) that specializes in ski boots that the range of pronation movement we need in our boots is around +/- 3 degrees. Now, I don't know what I am getting, and don't know if this is even correct, other than to say that my settup is the best I have ever had. I'm thinking of letting him make a footbed for me this fall, just as an experiment.
In a nutshell the tests I refered too determined that a close fitting boot cuff coupled with gentle pressure keeping the foot down on the boot board, in a boot that has less than 3 degrees of ramp angle, forward lean in the range of 12 degrees, worked best across the board. The tests were ran in a device that actually gave real time feedback from 20 pressure sensors to a computer, and was tested on a range of skiers, from worldcup downhillers to novices. Many may not want to agree with his results, but the data is there to back it all up. The testing device could be adjusted to emulate different lean angles along wiht different ramp angles and showed how these affect performance. Very interesting stuff.
I took his advice and have had as close to boot nirvana as I have ever had since then. Maybe we all have more to learn. The pads take me about 45 minutes to make. Later, RicB.