Find this interesting even not having that tractor for two reasons. First Kubota is aware they have issue with the seat they use on their L6060 cab tractor, not sure what all models it is used on. It is suppose to be rated for 265 pounds but people as light as 200 are having issues and Kubota is not wanting to accept any responsibility with it and saying dealer. Fell same about Kubota ignoring an issue they know they have. Can see the lawyer ads on tv now like on Roundup and such.
The main reason though is worked for heavy equipment company and the way we fine tuned the control levers was heat red with torch and they bend easy. Let them cool, clean up the metal and repaint. Would suggest getting a round steel rod and test the shape you want first. A good stiff wire could be use to get pattern.