Add a STMM (seed tube monitoring module) from Ag Leader and appropriate CT350 to AL adapter harness and power/CAN wires down the planter tongue and you're set without having to worry about ISO or VT/UT stuff. You'll see the true good looking advanced seed tube monitoring screens. 

You'd need a display cable, power cable etc of course but all pretty simple. If you had clutches on the planter or wanted to add them you could with a clutch module or two. Two if you want to clutch all rows. 


I did all these things to a 2004 1790 and it's still doing fine after many years