Giant Robot K1

Kettlewell's Robot from the 1974 story, Robot, featuring Tom Baker as the fourth Doctor in his first adventure.

I've included walking and standing leg options and a separate Disintegrator gun as well as a right raised arm option with the gun attached.
There is a left and right raised arm option and the lowered arm option is reversible so will fit left or right. The head is separate too so that it can be posed. They all have ball and socket joints so that some variation in positioning can be done. It's not a tight fit, though, so will need to be glued.

This will print in 38mm scale or 1:48 (ish) to match the Warlord miniatures and is around 60mm mm tall when assembled
If you want to reduce it to 32mm scale then print at 84%
For 28mm scale then print at 74%
I've not tested it at smaller scales but it should hold up, though fine details may be lost.

Modelled entirely in Blender

Printed files printed on an Anycubic Photon S with a Chitubox mono upgrade.