Interesting idea mate
Your hardest bit will be picking the right thickness to match your weight
Unless you know a really good designer that can calculate the exact thickness you will have to experiment and that could get expensive
Also the welding will soften them so they won't be springsteel anymore just steel and that will bend and stay there so you might be better clamping them
Having said all them I will be interested in the results as it could be a really good thing if they don't weigh to much
Jason