Ah well, Jonathan.
I prefer the 10mm rod fixing arrangement of the TX but prefer the piston body of the LGV as you get a larger choice of piston seals.
I also prefer the rear tit on the LGV piston rod as I find it works better with a modified Rekord top sear.
I'm wondering now if you could tap out the end of an LGV piston to 10mm and then use a custom made TX rod in it ? --- in this way you could have a piston able to take a Weihrauch piston seal with the easily changeable stroke of the TX.