Here is where I have just enough knowledge to be troublesome.
I can relate to that, though I'm still a beginner here. In any case, I've always gotten the impression (for whatever that's worth) that the basic diced were fair game for all.

Don't know what the thoughts are of clashing, but my sett is red and I was thinking (read: fantasizing) of getting a pair of these someday in the hazy future.

I wouldn't think the similarity should cause any problems, but I do very much appreciate this much attention and care to such historical detail.