re: fine grain cpu speed - Some games/demos won't work correctly unless this value is modified. For example, the demo Andromeda_-_Nexus7_(1294_AgA) will just stay on the swirling vortex the entire time if your CPU speed is "Max" or "Real". If you change the value to "93%" instead, then it will work pretty well.
re: all the chipram vs fastram comments. I was under the impression that chipmem was more important than fastmem, but I guess I'm mistaken. Regardless, I don't think you'll run into any more memory barriers with the currently available options. WHDLoad stuff recognizes the extra chipmem and uses it. I'll add more fastram in v4.
michoko - re: jerky starfields, etc. I believe what kimota said is correct.
re: flickerfilter level - ok
re: BINs. If the BIN file is equally divisible by 2048, then it will probably work fine as it is. Open up the BIN file in a hex-editor and jump to location 0x8000. If you see the text "CD32" or "CDTV" on that line then it should work fine.
re: sometimes loading and sometimes not - I think you failed to read the "Important Notes" section.