Since these blades are getting popular again now that they can be used on the new 2032/38R models, I thought I'd start a new thread for/about some helpful modifications and additions.
First up, adding a new urethane cutting edge and extension wings, I felt the blade was a bit narrow (66" wide) for my 3720, so I wanted to extend it 4" on each side. I had the urethane edge on my old #380 plow I modded to fit my old 4110, it was great! SOOO much quieter and still very effective. That thread was posted The urethane parts where purchased from Universal Urethane Products, the blade was 78" x 6" x 1" thick, and the wings 10" x 12" x 1".The longer 5/8"-11 x 3" plow bolts are from McMaster Carr, part # 90934A806
Remove the steel edge, and lay on the new one leaving 1-1/2" showing on the bottom. I also left 4" on each end since I was extending mine 8" total. The urethane material is cut easily with regular carbide tipped woodworking blades-slow and easy. Regular drill bits are used as well. Now you can drill the 5/8" or 3/4" holes about 1/2 way through, then remove the steel edge so you can lift the new edge off the floor to finish the holes:
Now you can do a test fit with the longer bolts, note you will now have to mount the steel edge upside down (another gripe: Why don't they put the holes in the middle so you can reverse it?):
Once you know all the holes will line up, insert the wing behind the steel edge-it will clamp it tightly when the lower bolt are tightened. Bend in towards the blade the best you can, this stuff is super hard to bend (it's 90 durometer for the techies) and mark/drill the two 1/2" holes from the rear:
Now remove the cutting edge, and mount the wings, the lower hole will be covers by the steel so you will need to use a 1/2" carriage bolt and suck it in so it's flush. Use regular 1/2" bolts on the top:
Here is top view, I am going to leave the wings and cutting edge unsupported for now and see how it acts in the snow, I have a simple plan to support them should I need to but as I wrote above, this material is really stiff and hard to bend.