Is the Yak too small an airframe for you? People are saying these are coming in around 15.5lbs with a DA50, and are good 3d platforms. Depending on the 45, this may suffice for you. I'm planning the Yak and MVVS 45. We have a 7kg weight limit in Australia. Anything above it needs an inspection. No big deal, but sufficient to attempt the lower weight.
Good luck.