I have the enzo sac (1500lbs)and a 750 in my Centurion (and 440 and 250). For the tall part of the sac it's actually smaller than the 750's dimensions. The majority of weight of the enzo sac is the very long arm. They make a custom enzo sac that's 1200lbs but they just shorten the arm.

I saw a FH sac that was just a tall rectangle for sale on ww months ago and it was 1500lbs, and no arm. It was like 2x750s stacked on top of eachother. It was not for a centurion boat. I wanna say a nautique guy was selling it. Only one I've ever seen. Sounds like what everyone wants to fill those lockers to the max.

I'd like to see: 56x20x40h or so as a custom for me.