Running two sounders on one network

[Mountain Boy at Sea]

preamble: wholeheartedly agree with davej - Chuck, you are incredibly helpful for all of us DIY'ers here. Many thanks!

Like davej I am in the process of adding a second transducer (CPT-120) to my dual e125 installation on my 44 Sundancer as we speak. I thought I read somewhere that
- you can only have one source of data for the same item (e.g. depth)
- you can't really have two depth sounders close to each other (interference)
- running two sounders might overload the power draw

Since I just learned that the CPT-120 requires a smaller diameter thruhull than the existing Airmar, we are discussing reglassing and drilling smaller [censored], or, a new location. With you running 4 sounders simultaneously, my concerns seem unnecessary on all counts. True? If yes, and like davej again, I love redundancy, so it's all great news it seems.

Now, I assume that there is a minimal distance to be observed between the transducers - how much would you recommend as minimal distance?

Thanks in advance!