u/painauchocolatorange

Sorry this is underwear related and not bra, but I figured the people here would have good advice. I have this pair of panties from intimissimi and love the seamless mesh back. I thought I saw someone make a similar pair during braugust but I'm unable to find the post. Anyone know how to assemble them?

Got myself a lovely vintage babylock 4 thread serger! I have looked at the manual and have googled it but can quite figure out the tension. The back looks entirely wrong to me but I've never used a serger before so I'm not sure. I have attached photos of the front and back if anyone has any idea.