Re: 30 in deck just pushes grass over
I offer this strictly as an "historical observation", what anyone does with their own mower deck is strictly their business.
My Dad bought a new Gravely LI outfit in 1961; tractor, sulky, 30-inch rotary knife mower with the L-106 drive, rotary plow.
By the time I started using the machine to cut grass in the early 1970's, Dad had "customized" his mower thus:
> Removed the tall, rear "fender" and stored it (? I've never found it...)
> swapped short, front "fender" to rear of mower.
> Removed second blade and flanged washer, ran with single "grass blade".
After having acquired my my own Model L's with their 30-mowers, several with stock "fender" configurations, and using them, I have come to the conclusion that Dad did his fender swap because he found the tall rear "fender" tended to get hung-up on brush stubble, particularly when backing-up.
I have no hands-on experience with the later "sloping-front" 30-inch mowers, but just looking at them, I'm not impressed.
Back when the Howard County MD public schools had Gravely walk-behinds ( into the 1980's), most of their 30" mowers had the "chains" front guard... I always liked that idea, and some day will put some on my 30-inch mower decks.