Discussions over on a1k seem to indicate that Jens is currently working on a Mk. II version of the ACA1230s - the ACA1231. From my own (poor) attempts at translating, and with help from Google, I understand he is making adjustments that should cure the timing issues people have been having, albeit at the cost of some performance.
There's even a picture of a prototype on lifesupport!
Perhaps Jens could confirm or correct this.