I have a 06 rtv 900w which has the hydraulic dump. I know the new RTV900T has the tool circuit or extra valve to run all the external hydraulic tools now available. What exactly does this model have extra over mine and can mine be easily upgraded? Is it just another valve or does it also have a larger pump and reservoir and cooler. Also I see the upgrade kit listed for what I assume is older T or Turf model only. What does the older T model have that allows it to be upgraded while my 900W isnt listed to be able to be upgraded. I dont quite understand all the differences. My goal is to be able to convert mine to be able to use the tools.