Regulate, how close to the capacity of a 36" Mill do you expect to be milling?
Blue42 has a similar thread running, and yesterday, I Maxed out my 36" Granberg CSM, and measured it's Capacity, 36" is the the length of the mill's Rails, NOT it's capacity, with the End Brackets set to the very ends of rails, the mill's capacity was 33.5" inside the faces of the bar Clamps
Also, using a 36" B&C will likely leave you a bit short of the mills capacity, I measured my "36 inch" Bars on my 3120XP, 395XP and 390XP saws, both my "36 inch" bars, an Oregon Power Match, and a Husvarna Branded bar, that I Believe is produced by Oregon, measured 34.5" from Saw Face to Bar Tip, when mounted, NOT counting the Dawgs, leaving the Dawgs on will cost you some more bar length.
Also measuring one of my bars, I wouldn't clamp the nose end bar, any closer than 2.5" from the end, you don't want to squish your nose sprocket.
To get the most out of a "36 Inch" mill, you really need a 42" Bar
If you are expecting to mill very much 30" or larger, you should consider a 48" mill.
I haven't measured the max capacity of my 48" mill with my 44" bar in it, but the difference in weight isn't that much compared to the 36" mill, with the "36 Inch" bars mounted, the weight and price difference between, 36" and 48" set ups,isn't that Great, if you are going to be milling 30"+ logs, it is worth considering a 48" set up. If a 30"+ log is going to be a rare occurrence, then a 36" set up should serve you well
With Granberg, and probably most other, Alaskan Mills, figure the Max Capacity of the Mill as 2.5" LESS than the mills "Listed" size
Also to get the most out any mill expect to get a Bar that is 6" or so longer than the Mills "Listed" size
Doug