Sponge Report post Posted July 11, 2013 So I've been sewing away with my new cobra 4 and love it. I'm looking to purchase a bunch more colors of thread, but I wanted to get some thoughts on what size thread I should be using for 8 ounce leather doubled mostly, also does it matter how thick it is for what thread? I've been using B138 and I like it better than the 277 that cam with the machine, perhaps this is because I'm using the wrong needles? Is their a graph I can print out and stick next to my machine for thread/needle/leather thickness and sizes to use? Any help would be greatly appreciated! Quote Share this post Link to post Share on other sites
mlapaglia Report post Posted July 12, 2013 This is the chart I have next to mine. Quote Share this post Link to post Share on other sites
Sponge Report post Posted July 19, 2013 Thank you for the chart, I don't believe the needle size is my problem, but I could be wrong Quote Share this post Link to post Share on other sites
