Hi Nick,
I have a S175, it's a vertilift model 2006 and I bought it with a blown engine so didn't know if it worked, but a new 2nd hand engine later and it fired up with 2,250 hours on it.
It was an ugly duckling though, been used in waste, took 5 hours to remove all the household waste including sharps from inside it, and a further 8 hours with thinners taking the 2 layers of bitumen and red paint, as usual time is 'free' but I did treat it to a tart up with some bobcat paint which is rubbish as you have to spray it as it's thin as water and cannot work it for 6 weeks after.
All turned out ok now, I made an attachment which holds my timber grab and rotator out of it's old bucket, and made a set of sideshift pallet tines and bought a bucket and it's happy days, perfect for moving wood to and from my firewood processor in raw and bagged state.