i am thinking of buying a t3 cage for my ball and i had a few questions. i am wanting to go with the t3 and sliding doors. my question was do i need to buy one with a hole and in the top or should i leave it solid. right now i have a small lap on the cool side to keep it at 80-82 so i didnt know if the AP T3 cage didnt need a hole or not. i was also going to get the belly heat and lock. do i need to order anything else like a light for the inside? this is going to be my first AP purchase and i hope its a good one.