What is the difference between the 505 spray and the K2000 spray, I bought a can of some off brand fabric spray and only used it once, the spray was very heavy. I have only used the K2000 and it is too expensive. I do a lot of machine embroidery and the K2000 works like a dream. Does the 505 disapear like the k2000. I know the 505 is less expensive.