Thanks Sodo for the low center of balance advice. The drawbar (see post 106) ended up being about 8" above the base of the form. My 3pt lowers to 6.5" on level ground so 8" allows me to set it down and disconnect. Maybe I'll stick with 1200 lbs, because going the 1500 will raise my center of balance.
Mechanicalguy, You and I are trying to decide on weight. I read your other discussion thread. The 5200 is a big tractor and you think 1100 lbs is enough? I should be okay with 1200.
I am taking my form to a concrete company - they will fill it get $20. The have a forklift so they will put the pallet back on my trailer.