I have an improvement to report. While using the standard HWFP supplemented formula I was noticing that the growth of the mycelium in the bag was producing a "marbled" effect where in several areas the myc was weaker. I gave it some thinking and some trials and it turns out that the weaker areas of myceluim were the areas where there was the bran! I have run a small batch of bags without bran supplementation and the growth of the myc is beautifully uniform! Next challenge is pinning. I am suing the method suggested by @Ratatoskr and also have a couple of kits with casing. Will keep you posted.