I did a check through Laylax's webside for Prometheus spring guide and there is none. Unless he mangled a V3 spring guide in. The only V7 Spring guides I've seen is the one from Guarder and G&P.

Sorry guys you are right !

This was a guarder ball bearing spring guide.

For the pics they are in the media section, i'm trying to find someone to host them and make them visible.

JF