I'm not sure what your dealer is talking about :confused3

ther than
Kubota has no top & tilt sets for the BX & B series tractors, I sure do. As far as him saying that there are only top & tilt sets for the L series and bigger, there are only Kubota top & tilt sets for the some of the L series, all of the Grand Ls and for the MX series tractors. They have nothing for any of the M series machines.
As far as the control valves not working, again not sure what he means. There are factory rear remote valve kits for all the B series tractors that I know of and for some of the BX series. Some of the Kubota rear remote valves on most of the different series tractors seem to have internal leakage problems. This is a hit and miss situation. The majority of people do not have the internal leakage problems that are commonly talked about.
Any 3rd party open center valves can be used, you just have to build mounts for the valves and couplers and get hoses made to plumb the valves into the tractor's hydraulic system.