Steering shaft pin

I agree in using a press of sorts.

I started CAD to make one, just need someone with machineing abilities to make it.

It's pretty simple, a bolt on doughnet clamp with a threaded rod that has a rollpin punch on the end.

Tighten the threaded rod and the roll pin comes right out. No hammering needed.
i've used a big C-clamp with a deep socket on one side and short punch. also used a motorcycle valve spring compressor that worked a treat too.

but i agree, something to support the assembly and not put force on the steering input is critical.

like all things in life, a positive out come is a product of heat, lube, pressure and angle of attack.