Sorry. I should have said Supra has been out of stock for the last few months and not meant to say Supra is out for good. I would buy more once they are in stock.
All I'm saying is, cow collagen are more or less the same. I'm not at the point in my life where I don't want to spend the extra $20-30 on quality processing.
To me, if cheap gut survives the stringing process, then it's going to play like gut.
Found this thread on google by accident. From the looks of your Mamba strings, they seem to be exactly same as "Global Gut" 16g that I bought from eeee-Bay (from India) last year.
They are absolutely fantastic in hybrids with poly cross. They last about 10-15 hours for me then I have to cut it out because of loss of playability. I am so glad I bought 30 sets from them at a bargain price, still got 23 sets left
Here are some photos, cross is Pro's Pro Red Devil, and this setup is 6 hours old: