AJWilling said: Thank you for your input, but corrosion resistance is not what I asked about in my post.
I understand that. My response is coming from a guy that has three Workman mounted Vicons that are rusted through after 6 years. All they are used for is fertilizing around houses where we can not get a tractor and Lely. That's about $90,000 heading to the scrap yard. Since you have the option and experience using the Lely on your golf course, I would suggest you would look into that. It's was just a suggestion.
And yes, you can sling fert with the topdresser. We do it all the time. But, our units are on a four year lease, so I don't care what shape they are in when they go back. If you are in the same boat, go for it. If not, and you are owning the topdresser and cart, then my advice is to also purchase a Lely.