A confirmation on that thread of the battery compartment size:
sure... 7 1/8 long, 1 1/8 tall, about 1 3/4 deep. It has these movable battery stays so you can have a snug fit for you batterys, nice little feature.
180.9mm x 28.5mm x 44.5mm
Was hoping for a little more height for batteries - looking to go for a Tekno 1515/3D (1360kv) on 8S and (sticking with TP cells for now) leaves me with 2 options: