Opinions appreciated: check valve vs anti-siphon holes in overflow returns

[gregzz4]

Originally Posted by paddyob

Check valves work great, but over time the seals dry due to the salt in our tanks.

Thanks, that's what I suspected
I'll try my latest configuration and am still contemplating drilled holes, but only as a backup.
I have a lifetime subscription to Back-up magazine but am also trying to go with the KISS method.
Because I haven't tested my system yet with salt, I have no idea what kind of micro bubbles I may end up with due to my current config. This is why I'm leaning towards no holes.
All I can do is try it and worst case I replace the drilled pieces, right?