they even gave me a 20 dallors off for being a TBN member. They only recently offered the hydrolic option. I am very happy with it and hold up well. my dealer beefed up the welding when he put it on.
Kubotas B2710, M6800, L6060 cab, Volvo EC excavator, 2 ZTRs and various implements.
Local welding shop proved the best option for me. Did not have to transport the machine and they happened to be the shop who built them for most large local excavators. Mine is a small excavator and I just was not comfortable with what I could find pre made. kt
Before you add a third party thumb check out the cautionary tale of a guy with a similar sized Kubota who found that the thumb ended up bending his dipper arm requiring replacement. These are powerful hydraulic tools and if they aren't properly designed or sized or installed they can do damage.