Hey @Ron, I'm impressed by the results of just 15 pictures. Your stacks are always on a real high level!
May I give you a tip for Helicon Focus?
Be careful with method C for areas with high contrasts. You'll get sometimes ghosting effects where the background shines / merges through the foreground. I marked some smaller examples which I've found in your stack. You can correct this with the retouching function from Helixon Focus. Just press F9 to get the correct layer and use the brush to correct those areas.