Steve's A1 guide is just the best! But it has highlighted the challenges of trying to setup the A7R4 to match. I use the A7 as a backup to the A1 but am finding it difficult to go back and forth (and missing the ease of this with the D850, D5, D500). Because most of my shooting is wildlife and 80% of that is birds, this is a bit of an issue when speed and muscle memory are involved. I also don't yet understand the limitations with the A7 and ability to use Animal Eye focus. For now, I can't afford to sell it and get a 2nd A1 for backup. I would be very grateful for anything you can share about the setup! TIA!