noiasca:
by the way it's a bad idea to reopen an old thread.
Open your own one,
Not always a bad idea, and this is one of those times.
The new poster specifically asked the OP and by extension previous respondents "What DMX shield do you use?" and it makes sense to ask that here.
Of course, those folk may not be around to see the new post, but that in itself doesn't make posting in this old thread a bad idea.