Does anyone know the "I" and "J" measurements for a 26m. I need to order some new sails and can't get to the boat for a couple of weeks.

I installed an octopus drive unit in the 26m binnacle after looking over the wheel pilot and internal ram options. You do need new cables installed too. Works very well but it is a tight squeeze to get it all in. It also came with a tilting hub so I can lift the wheel to get more leg room at anchor....