https://discord.gg/t7pekGk in case anyone wants to join a fully public Harpoon 5 Multiplayer discord server. I can help you get to know Simplot2 and how to use it for double-blind games using the Discord channel. We have successfully used this method for both play by post (similar to PBEM style, submit orders, then update Simplot2 then show images then submit next turn orders) and real-time games. Discord offers both voice and video comms too for the realtime games or occasional "team" chats for Red or Blue teams.
Excuse the double post to this general forum, but wanted folks to be able to find this if they want to take part. - Peter Robbins