We've played with Scotch Whisky and Bourbon Barrels. We found that we had to pull the beer out of the Bourbon Barrels much quicker (1 month for 7.5% Porter) cause we felt we were getting too much tannin from the wood.
On the Scotch barrels we felt 6 months was needed. I put this down to the Bourbon barrels being first go around?
Blending would be a good way to increase youir output, go for it!
Jeff Rosenmeier (Rosie)
Chairman of the Beer
Lovibonds Brewery Ltd