I just received the newest edition of the red book. They've replaced 25MC1 with a different test, 26MC1. This appears to be form J08 from October 2025 with the experimental items added back in. I'm assuming these weren't the same experimental questions students actually saw on test day as that would defeat the purpose. The raw-to-scale score conversion table mirrors that of the paper test rather than the digital test, which differs slightly.
The remaining three tests are the same as in the 2025-26 edition (25MC2, 25MC3, 25MC4).
Unbelievably, the publisher again included the answer form for the legacy test (75 items for English, etc.) instead of the enhanced version. I've also noticed an error in the answer key, again. For 26MC1, the experimental items for the Reading test are shown as 20 - 27 when they should have included item 19. If you're tabulating your number of correct responses, you could end up counting a question you shouldn't and thereby inflating your score.