Thanks everyone!
Yes espeefan, the piece is well casted by the guys that have done the work. I have not the possibility to do a work like that from myself.
Now the next challenge is to build the opened center valves and more difficult is to put nine of them into the width of the cabin in an in-line assembly. The space available is 200mm of width and 59mm of height. I'm not a fan of the accessories like tong or quick tool change but i prefer to have the possibility to add them in the future.
I have already start to build the prototype of the valves and in a few days i'll test it and know if it works well or not.
See you soon.
Enrico