I'm joining a band that plays in drop A#. I don't want to buy a baritone so I am tuning down one of my guitars, a Jackson Dinky Reverse. I'm having a lot of intonation issues which I expected, but I've gotten to a point where I can't go any further and I was hoping to get some advice before I make some modifications that cannot be reversed.
I can't get the lowest two strings to intonate properly. The neck is about as flat as can be, the saddles are as far back as can be (springs removed). The string gauges are pretty fat 58, 48. It's a regular ass tremolo bridge (non locking). The guitar scale is 25.5"
My next step is grinding down the saddles so that they can move further back. Is there anything else I should try before going this route?