Re. the gauges:
I talked to the dealer I got my RTV from. He said Kubota will replace the gauges that are fogging under warrantee, but... It may be awhile. He said Kubota is looking for a different supplier and once that's done, the demand will by high.
I saw in another forum somewhere (haven't been able to find it again) about gauges fogging that they believed the gauges may be fogging up due to a flaw in the manufacturing process where they were sealed up before the glue or something inside had a chance to dry. When heated, it caused the fogging effect. At least for mine, I still think it's humidity.