I know what you are saying ..i like the italian/jap diesels in general.
I want small lightweight mobile units. 250 bar 17 lpm will work 2 x 025 on the whirl-a-way well. 13hp honda is really only 12 hp so we can lose 10% through old age and still have 11 ... it will still be efficient.
Units will weigh in at about 70kgs.We suffer with water pressure round here so feeding anything more becomes a problem. Calculations show that set up will have the same "cleaning power" as 200bar at 21lpm.