Hi Steve,
Yes, think our posts did cross. I agree too with your logic, would be best if all observers could use same reference, whatever it was agreed to be. Since still experimenting have made note to do comparison based on several references at next available opportunity to see what differences accrue. My efforts for AG Pegasi on 16th Aug. attached. A lot of noise, but H alpha, beta, gamma clear – also some He I & II lines.