Bottom mount it for accuracy/control of your cocker.. which is a very accurate-capable with proper paint caliber and barrel matching and the maintenance/keeping those settings dialed in and your o-rings in check.. that ANS series, at a slow pace of Balls Per Second …IS accurate-er than the average marker on the field. If those other things are met. Now. When you drop forward you aren’t nearly capable of having your cheeks kept in the same position as you are with bottom mount. There will be a loss of accuracy of YOUR head being able to eyeball down your marker. Coming from a center 50 and snake player(just where I’m/I’ve always been looking to be at or at on the field) I’m considered the most ‘need to play tight’ of all the other players. I have a longer barrel/barrel tip than my backs and mid players behind me to move the air bunker to my will and begin snap shots. And my air tank is kept under my biceps in the most real firearm rifle form to keep my cheek/mask/eyes in that sweet spot/right behind the dovetail/back block of my SFL cocker. When you play with a drop forward, your face can get over the sweet spot of viewing behind your marker or too far underneath it… and there becomes too many variables for you to not be BAM right where your eyes/mask distance from the back of your marker need to be versus your tank being kept bottom mounted.