DigitalQ,
Nice A2000. Its one of my favourite Amigas. You will have fun expanding it. I have one as well that is expanded just about to the limits of available slots (Picasso IV gfx card, Blizzard 060 cpu & scsi card, x-surf, delfina, subway, GVP I/O etc). I have used many different accelerator cards in my A2000 and have never had to modify traces on the motherboard. What accelerator are you using and what is the rev of your motherboard?
How much Amiga stuff do they have at the World of Commodore show? Thats not too far from where I live. I wish I had heard of it beforehand.