Well, I was afraid the supplied tank looked a little small. I'll check the Brodak tank and look into building one as well. the .35 I'm planning to use on it has a .36 piston, sleeve and head. It may be a little more thirsty in a 4-2-4 than the tank can bear.
I had built a couple of the Aldrich tanks in years past and seems as though I remember it held about 3-1/2 ounces.
Thank Guys,
Herman