Update: Well, this is interesting. After putting money down on the Land Pride SGC1560, I found some conflicting information on Land Pride's website. They mentioned that the teeth were Grade 80 steel, but also indicated that the construction was AR400 steel. Looking at the tines, they had no removable teeth. What would you conclude?
Uh huh. I sent them a message asking them what their tines were actually made of because we can't have a continuous piece of steel that is of two types, ....ehhh? They replied that the SGC15 product line was actually made of Grade 80 steel and NOT AR400. Whoops! They said they'd change their product information on their site right away, which they did. Wow. Search across all other sites on the internet for dealers that sell the SGC15 series and you'll see it says AR400. That's a big mishap and at worst is misrepresenting the product. Kinda made me upset, but they have another product line, the SGC20 series and it is made of AR400 steel (confirmed). I had to go up to the 72" model (actually 74.5") as they don't have a 60" model in that line and another $1K or so more. So, went with that. Wide as my tractor's front wheels. It's on order now. Should be a couple of weeks.