Yuri linked me to this image, which is one of his older models from 2007 or so. The model itself no longer exists, but I think the shape and concept presented by it are almost perfectly suited to the Irra. In particular I like the front shape, good for a forward gun, and the 'tendrils' that loop outwards from the body and reconnect at the rear. I'd still probably go with the bomber-style flower wings instead of the spikes, and make them connected rather than floating, but all in all I think it's a good design concept.