I have a REV 6 A500 with a standard 512k trapdoor.
A jumper cut and a solder dab and I had 1M CHIP and 8M FAST (with Toms 8M).
Then I managed to get a MinimegaChip, so now I have 2M CHIP and 8M Fast.
No hard disk tho. Running from floppy, although I do have an AEHD High Density floppy drive....
It's pretty workable actually...
I am thinking of going to WB 2.x (I have 1.x in my A1000 and 3.x in my A1200, so it kind of makes sense). That's the highest I can go and still use the AEHD apparently.
Oh, make sure you have the command FASTMEMFIRST fairly early in your startup-sequence to save some CHIP RAM.
Don't run you WB in interlace mode either.
desiv