If you only removed the ROPS down to fender level, and the part that comes up from the PTO housing is still there maybe you could make a crosspiece that fits in where the ROPS came out and fasten your turnbuckles to that. Hopefully you've got a welder. If you're new to this forum you'll probably hear a lot of criticizm for removing your ROPS. Don't worry, I assume you had your reasons for removing it , and once that decision is made I don't see any harm in helping you with your modifications. I leave mine on because it's there, but my old tractor didn't have any ROPS or brakes and I survived it for 10 years.That being said the B7800 is probably less stable than my old tractor.Hopefully you've given enough consideration to the type of work you're doing and the type of terrain you're doing it on.Let us know what you come up with.