Hey Ryan,
Welcome Aboard.
Ive been there done that in 3.55 tinnie with a six on it and not for the fact that I ever felt threatened or scared but i up sized to 4.75 centre console just for when I want to go out side I can with no hesitation.
The 3.55 was a very skinny designed boat so walking around was like walking on a tight rope, and really busy days in the seaway was like being in a washing machine…
Once I put the floor in it, it made it a little more user friendly and an area for storage underneath.
I wouldn’t have put a 15hp on that one but if you have the wider bodied model a 15hp is the go..
The more time you spend in your boat the more you’ll get to know what it will and wont do and in what conditions.
As Craig said, ive had my big tinnie for 18months and this afternoon I was out there changing a few thing around, just creature comforts..
If I may, ive just got onto this facebook page that is all about tinnies and different mods that people have done to theirs. pretty good site.
https://www.facebook.com/groups/223134451195158/
good luck.
wayne