The actuating cylinders on your PA 32R are easy to remove, disassemble, check for wear, re-install new seals and re install. The process is explained in detail in the service manual. The seals required are standard seals; there’s nothing exotic or difficult about either the seals or the re sealing practice.
As far as the nose gear door; I don’t know that LoPresti cowl but can’t tell you where to look for your door problem. There could be something wrong with the linkage to the hanging door; sorry I can’t help further on that one.
STeve




