shoe lift improvement - please give me your opinion

i have developed with my husband a way to completely mask wearing shoelifts (95%+). I am not sure if you guys notice it, but when you wear lifts the contour of the foot is highly visible to others, as it is slanted and as the top of the shoe falls in, because of the missing foot which is slanted higher..

Anyhow I have developed a way to completely conceal wearing lifts between 2-4 inches.

I was hoping to start going live and selling these custom made shoes to the general public. Would you people, if you wear lifts, be interested in such a product. Of course bear in mind that while elevator shoes go for $100, the ones I will produce will start at 150 for 3inch gain and go as high as $400 for 5 inch gain. of course i will use brand name shoes such as prada, tods or others that have the good material to support my system.

Also i have solved the problem of the foot falling into the shoe and the person only being able to gain a maximum of 3inch no matter how much lifts he wears.

Well let me know if there is demand for such a product as I plan to go live with 1 month if there is.

thank you,

andrea m.