It has probably been already mentioned that if you make a USER preset, it's patch settings are lost when you exit Analog Factory 2.5. I noticed something else weird. I like the factory preset "80's" (quotes not part of preset name). I made some tweaks to it, and called it 80's-RCS, made it a USER preset. Sometimes, after I leave Analog Factory & return the USER preset is gone entirely. Other times, it shows it is there, but doesn't sound correct. When it does that, I click on "80's" factory preset, then click back on USER preset 80's-RCS, my user preset then sounds right.