i have a mft 17/42. i was in a dealership last week looking for a 21" spwb for a little "ditch" work. i had shopped his brand bf i bought the mft. he remembered me and asked if i had purchased a zt yet. i told him "yes" and he said that his line, gravely/ariens was the original zt. he also said that the hydros on his were larger ( i had to bite my tongue not to tell him that his minizoom and zoom series reeked of "home owner", while my mft is d<<> near commercial ). i remember that hustler claims to have made the first zt. i know that g/a has been around for a long time and i have seen other threads that claim they were the original zt. swisher also makes this same claim. who is right? is there some minutiae that i am mssing? also, i checked the hydrogear website and don't see ezt pumps listed. i saw a "zt" line under consumer pumps and there were several sizes of these pumps. are the mft pumps a zt line pump? which pump/what size? are there diferent sizes of ezt pumps? how are pumps sized? he mentioned something about cc's for sizing. all of this is a moot point, as i couldn't be happier with my hustler, but i like to know the facts to cut through the bs when it gets thrown my way. btw, there is a current thread on the ls commercial forum discussing the reliabililty of hustlers. you might want to check it out. i didn't see any reference to the outstanding customer service awareness and response that you seem to offer. here is the thread http://www.lawnsite.com/showthread.php?t=95691. i know that each manufacturer has their advocates and detractors, but what i saw doesn't jive with what i have seen on this forum. sorry this is so long, but thanks for the info. mc, keep up the GREAT work!!!!!!!!