Tony I gotta say I'm surprised it works with the TSA as ES really had issues making this and its optimised for the 152mm scope. A few users with the 127ED say it doesn't fully correct to the corners but your images look pretty damn good.
Because it's working so well....I'd say the 3" FT would be better bet to reduce vignetting. That said...the reducer was optimised for APS-C so maybe this would be an overkill!
Well done.
Brendan