This is a great thread as I am currently kicking around getting a new box blade. Let me start with some pictures that may help others. I have a New Holland Workmaster 55 (55 HP engine, ~45 PTO) that is about 7' wide on the back tires. I have a King Kutter 72" standard duty blade I purchased used about 5-6 years ago for use on my last tractor which was 39 HP with a cat 1 hitch. It was fine on the smaller tractor, although the smaller tractor didn't have enough weight when the blade really dug in. It has been great on my WM tractor for grading a mile of gravel road 2-3 times a year, now maintaining my 1100' driveway, and general purpose grading. However, here's where the problem comes in.
The first time I was pushing snow backwards backed close to the edge of a small ditch where the bottom of the blade caught. It severely bent/snapped the metal going to the hitch pin. I had it rewelded and things were fine. Now in the past couple weeks I was doing some extensive grading trying to make a slope to allow water to drain away from our home site (we had a modular home set right before winter started in). The blade was holding up well until I forgot to raise it once when I went to back up, and crunch the hitch was destroyed again, worse this time due to the weight of the mud that was in the blade. The side that was welded actually stood up better. I was tired, it was dark, and I was in a hurry, and the mistake was my fault for forgetting to lift the lift arms before letting off the clutch. Here are a couple pictures of the blade, before and after I had to clean all the mud out of it:
So, that's what happens if you have a blade that isn't sturdy enough if you are pushing backwards. Granted, I've been warned you can break more than the implement backing into things like that. So I was probably lucky.
Pulling forward the KK has always been fine. One of the sacrificers is slightly bent at an angle I believe after hitting a rock when having them down about 3 notches a long while ago and digging in hard to grade an area in our horse pasture. Other than that, I have had the sacrificers down 2 notches regrading a mile of gravel road with no other issues with the blade.
I need to get my KK blade repaired, but I am thinking of upgrading to a 7' blade because it does not cover my tire tracks which is really annoying when the ground is soft. So far I have considered:
Kodiak (Paladin) BS7R heavy duty box blade
Paladin Attachments - Heavy-Duty-Box-Scraper
Woods BSM84 medium duty box blade
Product Details
Land Pride BB3584 (from what I am told this is new to the market)
BB35 Series Box Scrapers | Land Pride
Everything Attachments ETA-CATI-II-XDBBV2-84
Category I & II Severe XTreme Duty Tractor Box Blade - Everything Attachments
Everything Attachments ETA-84XDBB-30-70
XTreme Duty Box Blade For Utility Tractors With 30-70 HP - Everything Attachments
Because of my debacle with the KK blade, I am looking to get something with a clevis style hitch, preferably cat 1/2. I'm not sure about the Land Pride, since I'm unfamiliar with the brand the BB35 series I believe is new, so I haven't seen one. The Woods looks attractive as the upper part of the hitch looks sturdy and is bolted on, so it could be more easily replaced if damaged. The only thing I am hesitant on the woods is how the sacrificers are behind the frame instead of through it like most of the blades are built. I'm not sure why they chose that design. The Kodiak seems too lightweight for me, but I did get quoted a great price on it from one local dealer.
Decisions decisions... I primarily wanted to post just to share my experience with the KK blade. I paid $400 for it used and it has stood up well pulling but never pushing. I've always avoided pushing backwards with it intentionally unless I was pushing something extremely loose.
Good luck to the initial poster with their decision. I am right there with you
Matt