Have you talked to the Grace Frame people?? I thought extensions were available for their LA to make to king size. I have the old hand quilting machine from them and they were very helpful in getting us the info to put it together again. Ebay carries great prices for their machines and frames , but I am still looking and debating the cost when I am 75 years old. Gammill prices are too pricey for me. The company based in Cedar Rapids that demonstrates at the Iowa State Fair Seems to be a good ole work horse. I think its like the kind of automobile one tends to favor one over another...its the one that appeals to you. I will feel good about a LA, then look at the sticker price and go into sticker shock.