I have a question for anyone who may know.

Can a seat harness be used as a waist harness just by not putting your legs into the leg straps or is there something in the design of the seat harness that would make it not work if you did that?

Dunno.. I can tell you dont try rope and a coat hanger....Have a go and let us know.....

Iv got a north seat harness, works fine when you don't clip in the leg part you can even fold it in a pouch so it's kind of a hybrid style. That said I still use a waist when I take the sb out

Some experience..

My mate owns and managers the gascoyne hotel, he had a tenant that tried to skip town who he caught and took the only thing he had of value, Kite gear!

He gave it to me to sort out, the lines were in a total mess and the chicken loop was missing?

There was also a seat harness, I tried it ONCE, as soon as I sent the kite and stood up it was supper uncomfortable and the feeling of dirrectional pull was not what I was expecting.

I undone the strps arond the legs. It was actually ok and the only real dramas were the dangiling leg straps whith the end buckles slapping me around. and the lack of support I felt it had.

If the seat harness designed in away that the bar and hook are not in any way intergrated into the leg straps, I dont see why you could use it if its your only option