Looks good! My homemade hammock looks about the same only I sewed a wide hem on the ends for the rope to slip through.
Curious why you made your own silnylon? Have you tested yours in weather yet?
I use those army cot bug nets for cots. Found that the bug net bought at the Girl Scout store (we had a troop for 12 years) weighs a third what the cot nets weight.

The tensioners are aluminum? How did you mill out the slots?

Nice job! Tell us how it sleeps.