After an unsuccessful bonding period with the PS, it looks like I shall be biting the pellet and going back to "old faithful". My old TX mk2 was a great rifle - god only knows why I sold it???

I'm wondering though, seeing as they run on delrin anyway, what you TX owners have done to `tune` your rifles? Someone suggested replacing the metalwork with TbT top hat and spring guides, but is the difference noticeable?
Anyway, thanks for your advice/input.
Bobby