Hi Rob
Found the hatch hardware drawings I had them posted on my web site after all but one of the links was broken, now fixed.
Here are the links to all three drawings:
Drawing 1
http://canadianmilitarypattern.com/H..._Paper%201.htm
Drawing 2
http://canadianmilitarypattern.com/H..._Paper%201.htm
Drawing 3
http://canadianmilitarypattern.com/H..._Paper%201.htm
Details on your questions to follow.
Cheers Phil