I read your post last night which inspired me to look up you-tubes on Registax and had another go at stacking an old Saturn Avi (no new ones as raining all the time here). There was a lot I was not doing in Registax and it really made a difference (see images below), one stacked but badly and lousy processing and the other stacked better, wavelets applied much better and some minor photoshop adjustment.

It was still a poor Avi in the 1st place and lousy viewing but I can't wait to get out and grab some better data and learn this processing better. Thanks for your post!