Quote: I like more the "in front of it" but a tad lower so that swivel screw is about 45 grade position from barrel line. And the rear one is IMHO better in front position.
I would be dubious about putting the sling swivel in this position, the 'purchase' a sling will have on it will be high at this angle and at the weaker part of the fore-end possibly leading to splitting out of the swivel.