No such thing as a stupid question! Thinking about it with more sleep this project would not use a lot of true
flat-felled seams, but the style is still partly applicable where all parts of a seam are going to be exposed in the finished item, and/or when you need extra strength.
A flat-felled seam is sometimes called a jeans seam because it's seen almost universally on jeans. It's about the strongest seam style around, and is very good at preventing fraying. I've done a little sketch of how to do the seam:
a) sew a standard seam with a wide seam allowance (I generally use at least half an inch)
b) iron the seam so both of the seam allowances fall on one side of the seam.
c) clip the 'bottom' seam allowance (the one thats trapped between the main cloth and the other seam allowance) down by at least half (I've heard suggestions that it be clipped down to 1/8th inch. I do 1/4 inch.)
d) fold the UNtrimmed seam allowance around the trimmed one and press again. (I had to do a little zoom cause I'd done the pic too small to show the wrapping idea)
After you've done that all you do is e) sew close to the new fold line, so it looks like the seams you see on jeans.
the way I was describing how I'd put together that organizer, you wouldn't be able to do a full flat felled seam, as I said earlier. But you could still do steps a) b) d) and e) - closing the raw edges of the vertical pieces in on themselves, strengthening the seam a bit and fixing the problem of fraying. I found myself having to do another sketch (Ugh. MS Paint.) I labeled all the seams in the order they'd be sewn according to my description (flat felled are two sets of stitching, so each flat-felled seam got two numbers) Only 1 and 2 depict a full flat-felled seam. the others are attaching an end to an unbroken stretch of cloth.
Does this help at all?
Btw, you realize this is making me want to do one of these organizers just so I can do a proper tutorial that lists how I really did it not just 'how I'd try'? Like I need
another project on the to-do list!