OK.
You are not going to get those snails to work with that tip location.
Or, you will not get that hole location to work with those snails.
The problem is that it will act like trap and reversion is all but guaranteed.
You will either need to find a snail with a taller outlet height (shouldn't be too bad), or change the location of the cutout (major bitch).
What logs do you have?
GT