I kept working on this through the night and have made enough progress to field it this evening in a game. Here she is in 'land raider conformation'. I've had some feedback on the shoulder mounted longfang looking out of place and I think it's wearing on me. I really like the more standard one overhanging on the ramp though. Maybe if both were positioned there?
I still have to add heads to some guys and more finishing touches but at least now everyone can see the general outline of what is to come. The banehammer turret fits overtop of the multimelta guy (no magnets required)! Also if you look closely you can see a teaser contemptor in the background!