We had a BI 40 across the dock from us for many years. We were also fortunate to sail on her several times, mostly in round the buoys racing in Annapolis.

We own an Allied 39, with very similar dimensions to the BI 40, although somewhat a lighter displacement. I installed an Alpha Spectra in 1992 for a two year cruise we were undertaking. It has performed flawlessly to this day and I would strongly support Ron's endorsement. We bought the Spectra after recommendations from several friends who owned the Alpha 3000. One of my favorite features is the articulating drive link disconnect.