I said 'yes' way back in 2010 (how time flies) and still think it a great idea.
In particular, I would love a simple chart telling me which piston heads are transferable from one model to another :
Firstly those that can be used without modification i.e. straight forward 'slip it on', and secondly those that may need modification with, if possible, details of the modification. The same could be done for breech seals.

Why not begin compiling a list of such things? A question asked in the General or Collectables fora could give much information.

A question I have been asked recently is regarding the Original 65 and 66 models: Are the mainsprings and the piston washers the same for these models? I think they are but it would be nice to be told so with 100% certainty.

Cheers, Phil