why do you need heavy, stiff double plastic boots and insulated overboots for winter mountaineering?!!

Being awed by the concept I didnt notice that its leather. My idea is to hack an alpine ski boot in order to reduce as much weight I can and probably my end version will be something similar to this. From different forums I have researched, I have found that ski boot work with most ice climbing crampons.

You may be trying to re-invent the wheel, because the ski industry already has "AT" or Alpine Touring boots. These are like downhill ski boots, but lighter, and with Vibram soles to help in climbing rock. Yes, they do accept crampons. Personally, I own a pair of Scarpa Denali AT boots, which are 4-buckle, fairly heavy, but very supportive on the downhills. I also own a pair of Scarpa F1 AT boots, which have a bellows on the toes, so you can walk and flat-ski more naturally, and are close to the lightest, if not the lightest, AT boots on the market. The trade-off is that they are not as supportive on the downhill portions.

Lot of compromises to think about.. I suspect a racing style AT boot wont climb as well as ice ckimbing boot because of the height and the aggressive angle.

while researching ski mountaineering I found a device called alp control

Looks pretty simple. If I can get right materials it would be a interesting MYOG project.

just wanted to thank everyone who commented.