Alu Cam end plugs from z1enterpices any good?

So I´m on a KZ1000 J3 from 1983.

Changing to aluminium cam end plugs and wonder if anyone with silmilar engine have tried
the ones from z1enterprises?

Cheers--Martin

If you do decide to go with them, DRY FIT them to the head and valve cover to make sure the holes all line up correctly. I learned the hard way and had to redrill them in place. However, they haven't leaked in 3 years. so there's something.