Ric- You might be right about the S series. I'd rather have a flip-up deck..
I'm just a home owner, trying to take care of my space.
My Z is a SS TimeCutter 4260.. Which so far I'm very pleased with.. The 42" really can get into tight spots & fly on the open areas, I was looking at the 5060, but it won't fit into many areas around my house, & eats up too much floor space in my shop, I got 3 bikes, my truck & the Ol's ride..
I would agree no steering wheel for the Z-Master.
PS: The only Z Cubs I see around here are the Farmer's, who has a couple older commercial units with lap bars.