PanF+ is not a "certain" developer dependent film. Use want you want or have on hand. Of course it seems to do better, at least for me, in two developers that I use. I've tried it with Xtol, PyrocatMC, Wimberley's WD2D+ and Wd2H+, DK50, Perceptol and Rodinal. The two developers I speak of from all the above? Rodinal and Perceptol(homebrew) are it. I use the Rodinal at 1+100 semi-stand and the Perceptol 1+2 or sometimes 1+3. If I had to pick just one developer for PanF+ it would be my homebrew Perceptol. If it's a normal/bright scene I'll rate the film at ISO 25-32 and use 1+3 or sometimes 1+2. If it's overcast/foggy I'll go 1+2 and rate it at ISO 50 and kick the developing time up one minute to maybe two. I would imagine Gerald's approach with D23 1+1 is very close to my using Perceptol. You can take that last comment with a pinch of salt (chuckle). PanF+ is not my number one film since I shoot mainly with a big, clunky Pentax 6x7 and a tripod is a 100% must with PanF+ and that setup. I don't use HC-110 so can't comment there. All said, PanF+ and Perceptol would be my number one pick of all the developers I have used with the film. Just me of course, John W