Sorry Mike, all the dup ones I had I sold long ago on ebay.  I regret selling the Mike Tysons Punchout one cause I still to this day can't figure why it had one in it.  I have several of them in my collection but don't really plan to sale them cause I don't want to have to track them down again.

Not really.  I just keep them when I find them when I get games in.  I have them added on the game list.  I haven't really started collecting all the black box varaints yet, seals, converters, 3 screw vs 5 screw, made in japan, TM, and ID codes, handtab boxes.......I haven't decided how nuts I plan to go with all of that stuff yet.  I still have a lot of other stuff to get first PAL wise so the answer is nope not yet.

I don't think the PAL games have the adapters, but I am not 100% sure cause I don't have that many PAL games yet.  The reason I don't think they do is because the PAL market came in to popularity later than the US market did and most games don't get released over there until after they do here.  So they prob had enough boards by then to make the normal games.  Nesaholic or jajaja might know a little more on the subject than me on PAL stuff.  I am just getting my feet wet in that market.