Re: Mainsail furler gasket.
Essentially, yes. There is a ton of information in the thread link that I sent you earlier including part numbers and sources for the parts.
Also, Woody from Mothership Adrift made a video of his rebuild: https://www.youtube.com/watch?v=s-p8bdPpnmk
Last, consider setting up a signature in your account which contains your name, boat model, hull #, boat name, and your current location. It will help members to better assist you with your question and if you put your location, you might even get some help in person. If you are not sure how to do that here is a link to instructions: https://groups.io/g/TentecArgonautVI/topic/how_to_create_an_e_signature/10289297?p=
SM #440 Cara
Belfast, ME USA