Here's the numbers:
XL Catcher wt. 23-24 lbs
XL Extender wt. approx. 14 Lbs.
XL Extender capacity: 4.8 Cu Ft = 3.8 Bushels.
1 Cubic ft. = .8 Bushels.
John- thanks for the help! Hopefully spring will get going soon over there. Guys in our area have been mowing for a month!