Yes it is small. I meant to mention that. I put a Kyosho tank in mine. Some of the guys at PRP use Serpent tanks. The Kyosho tank was on hand, so I used that one. It did not take to much time or trouble. Just a bit of grinding on the upper deck & and a little grinding on the plastic parts for the battery holder to get it to sit down as low as possible. While you have the dremel out, it is a good idea to remove a bunch of material from the inside/top of the rear bulkhead brace. That is the piece that goes across the very rear of the bulkheads. You will notice it has very little clearance to the rear belt/pulley. If any debris enters from the bottom, it can get wedged between that brace and the belt, causing dammage to belt. By opening it up, you allow any foreign particles to escape.