Tilt the 211 back when you are trying to change stitch length and see what is going on underneath.
The 467, either the 467 or the 467R, will use the same welt feet. If it is a walking foot machine, it has three shafts. One shaft is for the needle only, and the other two shafts hold the middle part of the foot and the outside part of the foot which are separate pieces just like the Singer 211.
No one lives forever, the trick is creating something that will.