I had asked a similar question through Pangolin customer support.
The reply (paraphrasing) was that providing unusually long cable runs weren't involved, and identical wiring was utilized in both projector heads, there shouldn't be a problem. I believe very careful wiring & signal shielding considerations would probably make the big difference.
I personally have NOT tried this yet - right now, it's just a bunch of ideas floating in my head, due in no small part to what I witnessed at SELEM
RR
Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
1979.
Sweet.....