If you are not on the Eccopro forum at groups.io (https://groups.io/g/EccoPro/) please check out the long recent conversation between Sally Peck and several users about Sally's efforts at creating a true 64 bit replacement for ecco. She has done a remarkable job so far, and she and several users are tweaking it daily so as to replicate the ecco experience as much as possible.
 
Be glad to sign up more users for the forum.
 
Maranatha!
Don Johnson
eccopro forum moderator