Hi all, Iam from India and Iam new to leather stiching, Iam using a 31k15 for all my works(backpacks, sling bags.etc) I use heavy canvas and leather, Iam pushing 31k to its limits,hence Iam going for an up grade, so now I have to choose between two options 1) brother ls2b837 and 2) adler durkoff walking foot lock stich, but the second one is three times more expensive, also it in beter condition than Ls2, so what do you guy's think I should go for, my needs are - should sew through thick material -should be able to use heavy thread- and should be with less mentenenc. Thanks all in advance, waiting for your reply