On the advise given a few pages back, I swapped out my 2.5mm ID duals for 2mm ID duals last night.
This has opened up the in-chamber airflow somewhat and is a definite improvement for me.
I went from:
28g, 5 wraps, 2.5mm ID, 0.5ohms
To
26g, 5 wraps, 2mm ID, 0.27ohms
The heatflux of these...