Good question, Matty, but the answer is no, it was never an option?
To use a TX piston I'd have had to machine the front off the TX piston and then rough machine a new 30mm piston head for it, then weld the two halves together, and then machine the piston head to final size.
Machining a one piece piston body is a piece of piss when compared with the above.
All the best Mick