#1
I have a custom cabinet which has sharp edges like say a home stereo speaker, will the little metal corner protectors work considering the edges are not rounded like a cab?
I do not have access to any to see in person but here is something that I may get.

Metal corners
#3
They wont sit right with sharp corners or sharp edges. You really need to round things off to use those kind of corners. And yea that shipping is a bit steep.