Those of you who are lucky enough to own longarm machines....can you comment on why it is or isn't necessary to get a machine that's regulated? I assume it's similar to the Bernina BSR? It seems all the top award winners that are featured on all the programs tout the stitch regulated machines and I was wondering how important it is. There are a ton of older non-regulated machines on the market and I assume they can't be upgraded? Thanks for your opinions.