Hi Peter,
I just had a similar decon problem. I solved it by using a conventional SNR mask and running a small decon (10 iterations) then I clobbered the stars in the SNR mask [PixelMath: iif(star_mask>0.2,0,$T) followed by a gentle Convolution blur] then hit it with a heavy decon (100 iterations.) That has done the trick and given a gentle star reduction without making them too crispy and still done a strong decon on the nebulosity.
Cheers,
Rick.
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