Alexander Seal

DG Couplings

Nick Dearnaley & John Greenwood

https://www.rmweb.co.uk/community/index.php?/topic/43748-easy-dg/

https://www.rmweb.co.uk/community/index.php?/blogs/entry/2451-fitting-dgs/

http://forum.gn15.info/viewtopic.php?t=3318

 rail top it should be 4.5mm to bottom of DG buffer plate,

Jerry Cllifford - The only variation I make is that I drill a single fixing hole to allow them to be attached with a 12BA bolt.

References:

Reflections Robinson, Bill 1991 Dec 93