Can you guys and gals please help me with this machine. It was given to me and the former owner sewed leather with it, but I don't know what thickness leather I can stitch and he is now passed away and I am unsure about some things. I tested it going through ~1/4" of leather and it went through fine, but the stitches are very very close. Can you space them out? Any info you can give me would really really help!! Thanks a million in advance!!