This guitar has tunable splits, which means that I can combine LKR and P2 to get a tunable G note on the middle G#, or combine LKV with P1 or P3 for a tunable C note on the middle B string. Tunable splits are a modern feature that you don’t find on some of the older steel guitars.
The inside pedal gives me a full A6th chord on the low strings, with RKR changing it to A7th. I use it mostly for rhythm parts.
This is for an ETS guitar that I used to play. I no longer have the inside pedal. See https://b0b.com/wp/?page_id=551 for my current E9th copedent.