Semi-flat felled ridgeline

I guess it's worth mentioning that I couldn't care less how it looks, so those 'rough' edges are fine.
And either way, the smoother side of the seam will be on the outside.

If I go with the semi-flat seam, do you think it'd be worth it to seam seal the inside as well for extra strength?

Would the exposed raw edges tend to come unravelled in the semi-flat felled seam?

The semi-flat felled seam has one (or two) less layers of fabric which can sometimes be important, like if you had to sew through them.

I've always just used the regular flat felled seam

I really don't think coated fabrics unravel like uncoated ones.
Or atleast I've not noticed any of the silnylon I've used unraveling.
I'm just going to get with the semi-flat felled and hope for the best.
I'll make a post once I'm finished and tell people how I feel about it.
Thanks