PS, When are you gonna do a Marauder destroyer, my favourite 40k vehicle?
Not for a while, for a multitude of reasons. Firstly the Marauder takes a lot of material to build. I basically exhausted my ready supply of cardboard in building it. The sheer scale of the marauder creates challenges in building it, both in appearance and construction. If you look at the nose and compare that to the fuselage you can see how much of a difference not having consistent materials.
The next reason it'll be a while is I don't have a template for the Destroyer so I would have to adapt the Marauder template for it. Lot of work infolved in that task.