Hello Mardy,
Thanks for that. I have emailed Mathias.
You are probably correct about the small changes. However, using C2A (which calculates for precession) as a reference I find the following differences for (e.g.) Hadar
Alignmaster (J2000) C2A (eq of date)
RA: Alignmaster 14 03 41.4 C2A 14 04 50
DEC: Alignmaster 60 22 23 C2A 60 26 25
Regards,
Patrick.