Delrin Garand timing block?

Has anyone tried the Delrin Timing block made by Satern? If so, How does it compare to the metal ones out there. Thanks for any info.

from what I have heard, the metal one is the way to go.

I have the Delrin one and it works just fine. I think that if you need one and have to use it every day, the metal one wood be the way to go, but for occasional use, the Delrin one is ok.

Delrin has worked well for me