Oh I've the same exact machine! After spending a ton on the machine it was a bit of a shock to see the Walking foot over $100!! But it could void any warranty if you don't use their brand and it causes issues :-( I sucked it up and got the guided 1/4" foot, walking foot and they also developed a special STID foot to use with the walking foot, that is pretty cool. I don't know about generic, I bought them for my Pfaff's because they are long out of warranty, but I was pretty worried about the computerized Viking?

Good luck wish I had an extra foot to send!

:-Debbie