Hello Wayne,
I wasn’t able to be sure about the size, so I contacted one of the ICS Technical Committee, Pat Barry.
Here’s his reply. I know he doesn’t directly answer your question but he raises a point you may not have been aware of.
JPI has all the info in its STC, or will answer a simple question, so you should be able to find out from them.
However, just ensure that he is aware that the JPI 700 series (including the 790) is not a primary system, so he will have the aggravation of having to maintain his existing gauges.
I’ve been installing the G4 from Insight over the past number of years. I used to do JPI (they are just up the road from me and I was one of their dealer / installers for years, but they used to tell me that the 760 was primary, and then they said “read the small print in the STC”. “It’s advisory”. They sell a premium priced 960 for about $14,000 or so which is approved as a primary unit, but the Insight unit is about US$5500 and is capable of many functions, like the JPI 960, but is less in price.
If you decide on the G4 Pat is happy to help you with the order if you needed help.
