Call for data: real received CW recordings (WAV/FLAC) + a 100% verified transcript . Email kd8cec@gmail.com , subject "NeuroCW data" . Figure 1. Everything NeuroCW learned came from the bottom panel: a simulated channel. Now it needs real signals. 1. Why real data In Part 1 , NeuroCW scored 5.07% CER on synthetic tests, but its accuracy on real on-air signals hasn't been measured. Just two real recordings were enough to expose a blind spot: Figure 2. On a synthetic heavy-weight keying test, one targeted fine-tune cut the error from 13.4% to 0.1%. Verified real recordings would turn findings like this into a benchmark. 2. What we need Figure 3. Checklist for one submission. 3. How to contribute Figure 4. Four steps. Several recordings per email is fine, and share links work for large files. Transcript rules: write exactly what was sent, including the sender's mistakes. Put prosigns in angle brackets (<AR> <SK>). For Korean or Japanese,...