So first, thank you for this, orked out great!
If I could make one suggestion for future updates on this.
The newer Ender 3's already have the parts you labeled bedCorner and bedCornerCover. (Similar design.)
How about a piece that would utilize the bedCorner one now installed from the factory and just create a revised bedCorner Cover?
I know that's asking a bit, and maybe your Ender doesn't have it.
I didn't use the bedCorner piece (Although I printed it).
I did use the bedCornerCover and will just zip-tie that as close as possible to the bed.
Oh, and I used 15 links for both.
I may even print a few more for the X/E chain.