I am ready to order but before I do I have a question that I cant 100% figure out. I am ordering a Puma but have only physically climbed around in a Cougar. When I have seen a Puma in person was last year and never looked in the back. My question/concern is the following: 1. Is there plenty of room in the back of the Puma for 4 batteries (Group 31?) and an on board charger? I havent seen any direct pictures of the well area so I dont know what I am working with. 2. The plastic trays, are they sized for DC27s? Or can I put a bigger battery in them without doing some “modifications”? Thanks!