Thanks and cheers,
I wouldn't call it a new idea...
I've been teaching a similar method when doing 'J' turns.
Placing both hands on the top of the downhill boot, puts you in the same position.
In fact when doing 'outside boot touch' drills...I encourage students to touch top of outside boot with both hands as it promotes better separation and angulation, creating better balance and a stronger platform.
It works well...especially if a student inclines rather than angulate.