fan mount

Quick question... are those push through the radiator plastic thingys used to mount fans ok to use? Griffin radiator said not to use them because they can rub a hole through a core. Ive seen them a zillion times......... what are your thoughts? Anyone use them for a long time...... anyone have a radiator failure because of these??? Thanks!
 
I personally never had an issue with them, ran them on a street car for years, and currently run them on my mustang, but I have seen them rub a hole in a radiator on my uncles old chevy truck, but he also didnt use the foam cushion between the plastic and the radiator, so use at your own risk I guess...if you can fab up a bracket then thats probably a better long term solution.