I'm thinking about answering an ad for a Mercury 280l, which I understand is a clone of a Nakajima 280l and a basically tyhe same machine as a Juki 241.Does anyone have any experience with these machines, I'm thinking of using it for pancake holsters, belts, mag pouches. I would like to be able to sew with a minumum of 207 wt thread. I'd appreciate any input, info on the Innernet is sparse on these machines, I spose because they are kind of out dated? thanks in advance for any inout.