This is a "remake" i did , by designing the whole thing, from scratch, by myself....as well as using "anti-cavitation" blade- and fin-concepts...
-> the measurements were taken from his impeller design (at 190percent)
With the center hole , still beeing 8mm in size , as well as a 3x32mm "splinthole" (horizontally of course..) and the outer diameter is 70mm
If you want to use this with the original water-jet-drive ,
you should scale it down to 52.63 percent...