That had the potential to be rather nasty.
Glad it gave out at low speed & that you are ok.
Prime example of why steering racks are best left to the folks who know what they are doing & have the equipment to do the job right.
One glance at the steering rack on my new project was enough to make me go out & buy a new one. ( Didn't even bother opening it up )
Hope you are back on the road soon.