I usually keep an extra session of Rhino3D, the program I do my digital sculpts in, when I'm doing paying work for clients.
It's like keeping an extra sketch pad out, or what manual sculptors do with their extra putty while something else cures under the heat lamp.
So, here's one of three Destroid-sized mechs I'm working on. I'm reworking the Black Max, from days of yore, as well as a third, cyclops-type mech. More on those as they materialize.
Warhammer/Tomahawk/Excalibur is just there for size ref, just like the 12 oz digital soda can.