Hi Jason, really enjoyed your video with the ECU upgrade and the follow on video (good drone footage)
Like you I was stuck in the "could only get a 15hp during covid scenario", but eventually I did find a 20hp Merc EFI at the right money. It made a major difference to the performance on my SD360, not so much in outright speed but cruising at the same speed at a lower rpm than I would have done using the 15hp:-
https://www.rib.net/forum/f36/merc-1...nce-88972.html
Have you kept the Tohatsu on the same prop? If you have, I think it may be worthwhile trying a different pitch. I found it made a significant difference.
I really like the look of the Scout, but in its present guise it has to many " not for me" issues before I'd be tempted - oars/oar locks, rope etc.