As far as losing clearance depends on how much you have to spare. I made my wobblestoppers wannabes because I wanted 2 each front jack to control sway in both direction-couldn't justify cost of 4. But the lost clearance between mount and fenders is 'bout the same. I have a 1/2" on each side, when its going well--backing in is done methodically now :)
I think reference to difference of new style A7006/A7016 is the original Wobble stoppers (A7005/A7015)didn't have the fastgun, were manual, different mounts/retainer. They are (older style) still available a little bit less cost.
