ive mounted and worked on enough skis back in the day to say technically, this is a bad idea
and in common sense terms, your setting yourself up to eat shit hard. I cant blame you for wanting to save the skis, but nothing you can 'add' is going to give the ski (drilled 4 times) any more chance of holding in a binding. chances are its gonna drill in fine, and maybe a day, maybe a week, maybe a MONTH later, the entire system your planning is gonna rip out when you least expect it, and it might not be on a 10 footer either
so yeah, unfortunately id say the skis are kicked. I personally wouldnt experiment around with that sorta thing, cause the chances of injury are pretty easily accomplished
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