JIm Chuck, yes that's the updated rail that I have. I have a B type 2.58-1 gearbox and the service letter #17 recommends only C type gearbox with 3-1. It seems C gearboxes are un-obtainium. I am seeing contact on the rail from the lord mount attach bolts. Not very happy with that. I either have to find a 3-1 C type or E type or fall back the old style lower support plate mount. The latter is more cost effective. Thanks for the reply anyway, it looks like that was an upgrade on the bird you have. The mount is nice and shiny compared to the rest of the airplane.

Buckchop, PM me and let me know what you are thinking. I need the mount and the lower support plate and isolators if you have them.

Avmech