I tried the 2 adjustable waterstay setup, using standard Lewmar 3" blocks. these were deformed after an outing in 15 knots TWS using the Code 0, so I went back to fixed SS stays.
I didn't want to invest 3 x 200$ in fancy high load blocks, when 2 of them would be under water most of the time when sailing
The 12 mm Dyneema I used was totally stiff, so I had to throw it out. A gennaker would probably be a lower load, as it isn't used as close to the wind as the Code 0.
The angle between the prodder and the waterstay fixture points (seen in a fore/aft plane) will have a large influence on the size of the force as well IMO.
Alan