On a slightly more serious note...
Better than previously own bed pans ... Don't try to solder pin tubes to them
Anyting the Professor said 'is right by me'.
If anyone is going to use an arm like a Parma S16D 'Please' consider this is a 'vintage' race and remove the 'green stuff' off the lamination crowns ... Send it out, true it or a drill and W/D sandpapers, a little oil or water helps. Takes a while
I say 'reach for the 23'
Pin tube can be soldered in 4 places ... and/or glued/epoxied.