Peter,
Great to see folk experimenting with new processing concepts ( however BlurX is not my cup of tea )
Not sure if image sampling affects BlurX in relation to stars , however I use Startools Spatially Variant PSF Deconvolution to reverse atmospheric blurring in my images and sampling plays a significant factor when it comes to keeping all stars but in particular those smaller stars “roundish” rather than “blocky” when zooming in or pixel peeping.
My sampling depending on which scope I use is between 0.62 and 0.88 arc sec per pixel ( oversampled) which allows me to software Bin my data to a specific image size which best suits SV PSF Deconvolution.
Binning in Startools is scalable doing I can choose what level as a percentage works best. It’s not a set bin like 2x2 or 3x3 or 4x4 etc.
https://www.startools.org/modules/sv-decon
https://www.startools.org/modules/bin
If SV Decon is applied with the most suitable image size ( Binned as required) then generally I can zoom in to 300% or more and small stars still retain circular / centroid shape. If I Bin to aggressively to trade some resolution for noise reduction and the image size is too small then SV Decon will result in the smaller stars being a bit blocky looking.
Here’s an image from last year M16 which shows before and after SV Decon is applied for atmospheric de blurring
Unfortunately IIS reduces image to 200KB size so resolution is greatly reduced but you can compare before and after images
Cheers
Martin