Rope Cleaner tool for high pressure cleaner (Kärcher)

The rope cleaner tool for high pressure washer. The connector is for the Kärcher home type.
The additional part needed is the O-ring, you can borrow one out from your existing tool.

The challenge is to find the balance between the exhaust holes size and the structural solidness. Too small ones the part will blow up, too big ones the pressure stays low.