Well, I have not seen the pictures you are referring to. However, is it possible the holes were round &
once the square loops were installed & the metal pushed around them, you assume the holes are square ?
Just curious.
Also, any time you move metal to fill a void, you have to sacrifice metal from some place. Thus if you start
with a flat surface & use metal from that flat surface, you will have a void around what you are staking.
Unless you can have a near perfect fit & the amount of metal moved to secure the loop is nil.... Also, having
the base of the loop swelled, extinguishes that idea, as you have to get it down in the hole. So to end up flat
around the hole, the area around the hole would have to be pronounced first, then stake the loop & file or
peen the pronounced area flat ?
I seldom use a loop because I don't care for them. But the few I have used it was obvious they were staked
in to secure them..
Keith Lisle