Hi Cam,
Thanks, I will try the tip of stacking only in DSS and process in Photoshop or like I did here, in Startools.
Thing is, I am a complete noob when it comes to processing, so I was bumbling around for hours before I changed some settings in Startools and found the "slight" changes that made a difference but tried not to over do it...RAW files and TIFF are SOOOO big, compared to JPG it takes 30 mins just to stack a decent set on my cruddy PC's. Forget about processing, I have to shave while I wait for change to show its result on the display....

. I even had to borrow my son's Quad Core AMD 3.2Ghz Phenom X4 system to stack three sets of data so I didnt go insane waiting for my laptop to grind its way through it......
I am learning the tricks of layers in PS now, this pic was basically exclusively run through about 3 modules in Star Tools and it turned out quite nice, a good start, so I will keep playing with this data set and capture some more to hopefully get better as I go.
Sometimes I jump in when I have a nice"ish" looking result as I have spent so long processing badly that its almost a relief to throw it out there for comment because my brain has turned mushy from looking at the same thing for hours with no discernable improvements....and I need some feedback to keep me sane.
Frustrating, but challenging. I am still keen so just need some more play time and some more targets to get my teeth into.
Cheers
Chris