I agree with bradlake, if you want to get back to scratch.
Do keep in mind, though, that the "Factory Presets", while a great starting point, are not necessarily the "best" way a particular arrangement of gear "should" be set up. They are not "Defaults" to fall back on. They are a great demo of what the capabilities of the rig are, and are what sounded good to that preset designer (Cliff, I presume), on that day.
I nearly always keep a copy of the first Factory bank on my rig, for a reference to work from, and to refer back to, if I feel like I may be getting "too far from home". However, I rarely keep it "stock", in the presets that I actually use. For my purposes, I keep that bank copied at the end of my presets, sort of as a reference library. Other times, I delete all the Factory Preset banks, and just pull in the specific presets I want to fiddle about with. It's easy to put the Factory Banks back, or to delete them - takes about 5 or 10 minutes (well, maybe 15...)
As time goes on, and you get more familiar, you may find some "go-to" changes that you might prefer on all "your" presets. These might be EQ, low- or high-cut, delay times, tube hardness or type, etc. Don't be afraid to try different stuff. You can ALWAYS get the Factory presets back, if you want to get back to square one.
Also, it sounds like you've got a handle on this, but be aware that what sounded so-so in a previous Firmware, may sound mind-blowingly great in another firmware, and vice-versa. As an example, some of factory presets that I previously was not overly excited about, that didn't fit into my style, now sound wonderful, when I revisited them with the current firmware.
Be sure to backup your existing presets with FractalBot, if you think you may want them back. As far as I know, once you delete them, they're gone, unless you have a backup.
If you have room in your presets, copy one of the Factory banks, and compare it to your "adjusted" presets, to see which you prefer.
