So I have 3 Peny v3 and have bought many extras to try and get one of my internals to fit my ithaka however when I go to screw in the updated internals ( I have added the longer positve post and brass long nut) it won't screw all the way into the ithaka's
juice control ring. It gets stuck on the derlin big flat insulator. Any suggestions on what I'm doing wrong? Does the ithaka use a different internal housing ring then the Peny v3? Because on the website the are the same price and look the same but unlike other compatible parts they don't say "Penelope v3/ithaka"