Well done!
Yes, this is the Shotti, built in 28mm scale to be dragged behind a Goblin "Weirdboy Tower"
The "skull on wheels" part is from a Doom Diver catapult - I had used the actual catapult part in a previous conversion and wanted to put the wheels to some use.
The fingers and part of the stone are from a stone troll holding a rock above his head. Again, this troll was butchered for another conversion which left me with two badly damaged troll hands holding half a rock each - just glued them togehter, filled the gap with tinfoil and smoothed it out with gs.
A quick paint job later and Shotti is ready to be dragged into battle!
Why and what for? The orcs are absolutely clueless