About the only thing I can think of is weak parallel linkage?

The biggest gripe I have with Case is their unwillingness to listen to the customer.  Around here 800 -900-955s are far and few between.  

Sugerbeets......enough said.  

Deere and Burger king have the philosophy of ordering stuff how you want it, and I think it works.

There is no reason why Case can't offer a "retrofit" 1200 system on a 955 planter, other than they think its not a money maker.   They just came with a 24 row 30" planter and the bar looks like something Deere built 20 years ago.   Im sure it works fine, but its no Bauer!

I really shouldn't rant, I like our planters, just seems all to simple to me.

Good Luck