I don't expect manufacturer to make two competing models so quickly after each other. This would require bad planning at their side. Thus I don't expect upgraded T245 version anytime soon since T3A is new product (few months old). Anything is possible but this one is unlikely. Enjoy your T3A. Stand is only part and not that important part.
I asked one of the sellers if I could get the T3B stand separately, and they're offering it now. Unfortunately, it won't work with the station directly since it's using the original JBC-style 6-pin connector, but I don't think it would be too hard to mod in a connection to the plug on the back of the Aixun considering that it's just a matter of completing the circuit to make the tip sleep.
In your opinions, do you think that this would be a good upgrade station from the KSGER and FX-888D? I've been having a lot of issues with the 6 and 8-layer boards that I use for work (they use high-temp solder from the board house, and I'm looking at a via'd 8-layer ground-plane board). I'm thinking that maybe the JBC-style would work much better at 130W, but I'm not sure if this or the Thermaltronic TMT-2000S would be better or if there's a better option all-together in that under-$200 range. Thanks!
Has anyone probed the T12 iron handle yet to see what mod would be needed to get the temperature readout to work with the KSGER handle? I'd like to continue using the knock-off tips that I have while I save up for the JBC tips. Also, does this station have individual tip calibrations, or is it just one overall calibration like the original stands?