Well have you worked out how you are going to get the pivots to work?
They have to be able to rotate perfectly with each other at the same time then when you stop leaning return to their upright position. Also I think you are going to hit your legs on the ski posts, after all the foot pegs are attached to them. They are vertical where your legs angle up to your hips.

The skis have to be able to rotate front to back so they can ride over bumps or they will spear into a mound of snow and you will go over the bars. When in the air gravity will make the front of the ski point towards the ground. If you land like this over the bars. Take look at some other designs you will see a lanyard attached to the front of each ski.

Ji