Point motor extension rods

[ITG]

A simple question, but one which others may have experienced when I haven’t.

 

Starting on the new layout (see Depart here for Lockdown End thread in layout topics), I wish to mount DCC point motors (mix of Gaugemaster PM10D and Cobalt) below the board, as opposed to directly to the track as I did last time (to avoid cutting massive holes in board). This means I need to extend the length of the pins which were previously cut for track fixing.

 

I note both DCC Concepts and Gaugemaster sell extension pins (tho latter out of stock everywhere it seems) which come with a collar to join to original pin. Is it good practice to glue this collar or crimp it in place? If glue, any recommendation as to best use?
 

incidentally, online  I’ve found 100mm pins of 1mm or 1.5mm which will probably do the job without waiting for stocks. Anyone else adapted by using non-specific purpose made pins (although then where would I get the collars?

 

thanks in advance.

ian