I have a 2000 Larson Cabrio 220, Volvo Penta Outdrive, and the starboard trim cylinder began leaking fluid last fall at the point that the piston goes into the cylinder body. My mechanic told me he could fix it by replacing a seal, then found out the seals don't exist for the SX-M lower units and that the cylinder is throw a away. This after a month in his shop. He did not fix it or replace it saying you can use it just keep topping off the ATF fluid as needed. After reading posts on here and realizing that doing this will probably draw in water while on the lake and eventually sacrificing an expensive pump.I just ordered a new cylinder for 460 bucks and plan to do it myself. Should I be ordering new o-rings as well for the hydraulic lines? What do I need to know to get the old cylinder off as it appears their is a clip holding it in place? I have read some threads regarding the building of a "spanner wrench" if needed I think I can do it. Any tips would be greatly appreciated. Was glad to see I am not the only poor soul with a problem with these cylinders.