Unable to see the intended image, you would probably have to upload it to a free photo storage site or something and then put the link to it. Or I think there's another way to insert it in the post.
Nothing wrong with how you're doing it. I've been putting my MC paper inside of the cel bag, with a piece of cut up cel bag in between the paint and paper to make sure it doesn't stick. I'm currently in the process of my yearly exam where I take all my cels out to air them out, replace bags and MC paper as needed, and I'm rescanning it all since I have a new scanner. I have 12 binders so this is going to take a while.
The cel bags are all in much better shape with me using the MC paper I've noticed, so it does work. I don't bother to cut corners or sides of my cel bags since I just leave the one end completely open and don't seal it shut.
I use the Itoya 3 ring binder which is much sturdier than the profolio, so that I can have the binders upright on my bookshelf like a book.