To get 0.3 to 0.4 ohms that would need 10 to 14 wraps I'm not sure i would be able to fit a spaced coils that size in the Bellus
OK. You're using 317L. What Gauge? A coil 3 mm ID with 28G 317L at 0.5 ohm would require all of 4 wraps. 26G 6 wraps. 24G 11 wraps. If you're using 24G wire, get something small (higher gauge, confusing, I know). Coil wrapping