I think you there dont know nothing about midi keyboards...
About all the keyboards have ONLY the Channel pressure control and NOT aftertouch: http://www.borg.com/~jglatt/tech/midispec/pressure.htm

The brands in europe, like Roland, Korg, Ketron, Yamaha, Wersi...use only FATAR keyboards.
I have here the FATAR catalouge and they DO NOT have ONE keyboards kits available with Aftertouch BUT ONLY with MONO Channel Pressure.
So...If you ther think to have Aftertouch, is JUST one illusion!
Ketron is the first one that will buy and use the cheap/toys keyboards from Fatar.
I had one SD1 too, broken some keys when I had loading in my car. I buy the whole keyboard in Milan for only 37 Euro.

About the " Aftertouch" in SD1:
SD1 use the Dream chip too, NO one sound have the aftertouch but some are programmed with the Channel pressure.
Just connect the midi out of SD1 to one PC sequencer and record the event.. you will see: channel Pressure.
IF Lionstracs use the FATAR keyboard, for sure they have the same control, but they dont have programmed some sounds with this CC.