Ok, we'll start from the beginning ... do you know how to measure "mast rack" using either the main halyard (perferable) or the traps??? Tells us your measurement relative to the rear crossbar.

Next "who's" sails and type ("pinhead vs squaretop") do you have??? Dougs look like "Danger" Sails??? other common ones are "Smythe", "Elliot-Patterson", "Saber" in the USA.

Give us that information and we'll compare it w/ Dougs measurements and we can try and locate what needs to be changed/adjusted.

FYI: On my P19 w/ my pinhead mainsail (Smythe) my mast rack was approximently 18"-20" forward of the rear crossbar ... on my "squaretop" it is 12" behind the transom!!! as recommended by "Randy Smythe".

Adjust one thing at a time ... mast rack then rudders in this case since you can use Doug's P18-2 as a comparision to verify settings

Oh, the use of the longer P18 rudders is common to solve the steering issues on P18-2 and P19s. I purchased the upgraded eliptical though, but watch them as the have a tendency of splitting from the top down due to deflection under loads. It can be fixed if you discover it in time before destroying the blade .... you install dowels to tie the two sided together to prevent the sheer forces from splitting the blade

Harry
TheMightyHobie18/P19mx