I reached out to skiers choice, they said the rear bag as 102" long, 21.5" wide the front arm is 15" tall and the rear body is 24" tall. That is a couple inches off each way from me trying to measure, but plugging that into the wake makers calc its showing 1,562# bag, assuming a 36" rear compartment. That makes more sense that they are 1500# bags in the rear and 1,000# up front. rather than 1,250 rears and 1,500 up front.

I scored another 500# of lead from a local seller for $375 so I may skip the custom rear bags now that I will have 1,650# of additional ballast. 1,000# of lead and 650# of additional midship bags. All in on the weight for me is about $1,300 bucks.