Ok here is the difference:
Diamond rates their plow at 20 MPH. It uses a tougher A-Frame.
Diamond also uses 1" quick pins, Like Fisher. Not the little wimpy pins that Meyer uses. Diamond has 3 mounting points, However unlike the Meyer blade there are 4 Points of contact with the A Frame to the Frame kit. The Diamond Frame kit also has 4 Points of contact with the frame. However the Meyer kit that I have sean only has 2 points of contact.
This link will answer any questions:
http://www.diamondplow.com
You have to understand the Diamond is a tougher plow, the trip edge also puts more stress on the truck frame. You are matching a tougher plow with a Different design to a lighter frame kit, something will give, and not the plow. I am sure you could put a Meyer blade to a Diamond frame kit and be fine. I own 9 Diamond blades, I know the construction very well. After you look at a Diamond close up, or buy one, you will agree that you need the Diamond Frame kit.
Oh yea you will need the E 60H pump to run a Diamond blade, because Diamond uses a different lift arm than Meyer. The regular E 60 won't lift high enough.
You want to look at the Pull A Way system, Not the MDII. The MDII shares the same lift frame as the Meyer plow. However again the Frame kits are different. That is right from the Diamond dealer.
Geoff
[Edited by GeoffDiamond on 01-30-2001 at 09:54 PM]