i already have a 3m radsial, and have used it in some crazy winds (30 kts!!!) but am bored when there is less than 15 kts. im also buying a board for use in my feild(big) and was considering a 5.5 or 7m firebee, or possibly a 6m radsail pro. as i can get them cheap.which is best for me boarding and jumping (i weigh 70kg). also, is a scrub ilion canyon good on medium to long grass with any of these kites (or my 3 in 20 kts!!)