Our goal for the Combustion was to have a B-string that exceeded anything it it's price range while providing a sweet, warm, vintage-like tone. In that regard I think we were successful.
Our original intent was that anyone wanting the more high-powered, hi-fi qualities of FD-3 pickups could retrofit ABZ pickups simply and easily. A few customers have done this mod and have been very happy with the results.
We've been looking for a more cost effective solution for Combustion owners that would like a little more output and clarity on the B but want to maintain the sweetness of the Combustion pickups.
We now have a B-string magnet booster kit available. The modification is simple (although there is some minor risk involved - follow the directions carefully), inexpensive $10 plus P&H and very effective.
email me for details.