the ideal dimensions of a keg is an argument that will never be resolved.
what suits me, won't suit the next guy, and so on and so on.
Looking at Frank's range:
http://majorbeerkeg.com/Products/European_...rd_Series_1.htm
it appears to me that they are geared up for a set range of kegs.
Frank isn't going to jig up a special diameter for a peanut order.
The best we can hope for is if Frank could incorporate a cleaning hatch and a pair of sockets that are the same thread as the Corny posts.
If we can get that = at the "right" price = at the "right" quality = we have won the game.
Is is possible? --- of course it is.
Will it happen?
Well that depends on many things.
Franks company already makes kegs. That's a good start. To try to get kegs made in your run of the mill fab shop 7,000km would be almost impossible. Frank's company make kegs so we are already 80% of the way there. Are his kegs "acceptable quality"? Who knows? What is acceptable for me may not be acceptable for everyone. Is the material "thick enough"? Does that even matter? Will the stainless be an acceptable grade? There are many grades of stainless steel. Are the welds "pretty enough"? What is the pressure rating of the kegs? 130psi? Do they actually need to be rated that high? I certainly never have anywhere near that pressure in my kegs, but it is kind of reassuring that the kegs are rated far above the pressures I operate with. What design will the hatches, pressure relief valves, and post sockets be? I know that the fittings on my current kegs, although notionally the same, arent actually interchangeable. I cannot universally swap dip tubes, PRVs, hatches and posts as small differences mean that A will fit on B but not vice versa.
Frank, I wish you luck.
I hope this flies, but I also know how hard it will be to tick all the boxes, dot all the is and cross all the ts.