I have done some research on the hydrogear trans and found that all mini ztrs have the same system. But is there different grades of performance of different brands? The hustler says, zt2800 same as full hydro systems. And the phazer says Dual Hydro-Gear ZT2800 hydrostatic transaxles w/charge pumps and independent replacable filters. If they are the same why did my used to be dealer for mowers said the phazer has home owner pumps being he isn't an authorized exmark dealer and said to get the hustler because it is fully commercial grade and had a commercial system compared to the phazer. Also is the toro version exactely the same? I'm just wondering are the zt2800s the same on small commercial ztrs and different on cheap res. ztrs or are there all kinds of different combos of this integrated system. And will they last just like the traditional pump and wheel motor system.