I currently have J74 string on the Gil, though I have also used J75. The strings on the recording are not brand new, but are only a week or two old....
The oval hole instruments had a significant redesign at the same time, neck shape, truss rod, peg head shape, etc. I suspect something changed about...
Here is a recording I made this week with my Fletcher Brock Octave Mandolin and my Gilchrist model 3. The recording was an excuse to test the set up...