If anyone offers you an MF crawler .. hold out a cross and back away ..
They were a pathetic attempt by a company that made good small wheeltractors, to get into the, reputedly-highly-profitable, small crawler market. They were a POS. They ran a differential instead of steering clutches, a la Cletrac/Oliver small crawlers .. and we all know what a successful system, that is.
Find a soft spot, and the crawler with a differential will promptly turn into it. You have to stand on the brakes continually to get them to steer straight, whilst pushing under load. If the blade bites more on one corner, it will promptly turn that way.
Add in, an Italian-designed-and-made machine, for a company in another country .. and a company that only half-heartedly supported them when they were new .. and you have a liability termed, 'a millstone around your neck'.
Undercarriage for the small MF crawlers is totally unobtainable .. the Perkins engine, is the best part of them .. and anyone who buys one, deserves all the grief they get.
Once you own one, your chances of offloading it again, to some poor unsuspecting sucker, are about zilch ..