I have a Hot Spot, but don't know where he is....
Made from a Prime Ratchet and classics Grimlock head (oh the irony...)
Alt mode is unchanged so I didn't bother taking pics of it.
For robot mode, I had to use a soldering gun to level off the neck joint. It was at a 45-degree plus angle, while the Grimlock head had a level base and just would not go on.
There was a little ridge on Ratchet's waist. Once I got rid of that his legs were able to spin 360 degrees. I reversed the legs for this custom, but the backs of Ratchet's thighs are hollow, so I had to swap the thighs.
I've just noticed there's no Autobot insignia on him. Hopefully I have a small one to put on his chest.
And no there are no plans for Defensor.
Additions: forgot to add the back of Ratchet's waist - which is now the front of First Aid's waist - was also hollow, so I filled it with sculpy.
As a result of the thigh swap, which involved the use of a soldering gun, the knees are a bit weak, so I have left Ratchet's knee spikes on to help hold the legs up.