MOG, I bought one from D'Arcy for a Mod 70 classic 375 build. Great to deal with. Mine is standard fill and he put thresded rod cross bolts (?) in it for me.

Great to deal with and very prompt if he has in stock. For anything bigger than a 375 he reccomend a magnum fill. I haven't tried the stock yet as it is at my gunmakers. However, those that have tried it wanted to buy it! So I sent them his contact details

Cheers, Chris