Sorry, I can't answer the question you are asking, but I'd like to point out that by running two different units, they may not stay in synch with each other. It's common for recording equipment to use quartz crystals that have 100 ppm accuracy and +/- 100 ppm drift over temperature. Now they don't usually approach the worst case specs, but it's not uncommon for two rigs to develop 1/10th of a second skew between two sources over an hour's time. So in post, you are going to have to selectively stretch one vs. the other or do some other similar operation to keep the two sources aligned. I'm not saying that it can't be done, but it's not always trivial either. I've done a fair number of mixes like that in post and the results are usually pretty good, but it's not as easy as align, slice and burn either. It usually takes me at least 8 times as long to track out a show when using multiple, unsynchronized sources.