No problem Dave.
It seems i have to use a different methodology in DSS,i.e the Entropy Stack method
So to conclude load FITS fro DSS into Startools as per normal,and process normally and use the Layers module.
Actually, you should just be stacking with Median Kappa-Sigma Clipping, Kappa-Sigma Clipping, Median or Average methods.
You'd be creating 2 stacks; one stack with all the short exposure light frames and one stack with all the long exposure light frames.
Be sure to use the first completed stack as a reference frame for when you are stacking the second stack. This way all the stars will align across both stacks and you will end up with two stacks that are equal in size/resolution + have stars in the exact same place.
Now you can perform the Layer module trick from the mentioned thread.
The sample steps.
I have it as Enter Color module- mask-auto-keep.
back to color module-sample and then back to mask & invert,then back color module.
The steps are not clear to me,as results always seem overblown.
There are a number of different ways to color calibrate your image (see here
If you are creating a mask then it sounds like you are trying to use the star field sampling method (I am also assuming you are performing this color calibration towards the end of your processing, just before tuning off Trracking?).
The steps are indeed correct (the "Fat Stars" preset will likely yield the best star field to sample color from).
"Overblown" can mean a lot of things, but if you mean the colors are too saturated you can use the "Saturation amount", "Bright Saturation" and "Dark Saturation" parameters to control this.
If by "Overblown" you mean the color balance is incorrect (sampling stars that suffer from chromatic aberration can cause this), then see if you have more success with the other methods of color calibration.
I feel bad having you deal with my little problem when you should be busy working on the bigger startools picture.
No worries - proper support and helping each other is part of that bigger picture!