Since you are unresponsive to email i will ask the question here. ( a thight spam filter i guess)
I want to order a TT2 but i allready got a trackball from you with USB on ID 1.
Now what do i have to use on th e TT2 ID1 too or no board and connect it to the Y of the trackball?
The spam has been choking me out lately. To top it off, some evil ---tallywhacker--- has been using the customer service and tech support email addresses in the return address for their spam, which floods me with all of the backwash when they get refused. This has the effect of legitimate mail from my addresses being incorrectly blocked by poorly configured spam blockers, as well as some mail being lost in the deluge of backwash at cleanup time. It may be time for some overly restrictive contact scheme to deal with it, I'm afraid.
But yeah, what Havok said

ID's are really only important if you have more than one of the exact same devices on the same computer at the same time. The only current exception to this rule are the LED-Wiz+GP's when used with the LED-Wiz's. These share ID's for the sake of software compatibility and must always have unique ID's for each of either device that is connected.
On a related note - Randy, any ETA on getting Electric ICE-T Trackballs back in stock?
They should be here no later than Tuesday. I try not to let this happen too often, but I just had a big order clean out my stock unexpectedly.
RandyT