I bought the same kit as @nuffsaid at the Madison quilt expo. The drawback was I had to wait 3 weeks for it to be shipped to my home. It came last weekend and I have been playing with it on my Singer 15-88 treadle. This is the first time for me fmq'ing, so it is a combination of learning a lot of new skills at one time. I really like the rulers, I think that it was a good investment, I just wish I was better at it:-)
I also have a 301 and think that it would be wonderful to have a ruler foot for it. Irishrose2, I would like to know what you hear back from Westalee on a slant shank ruler foot.