Hi Garth
On the basis that your question is directed to me...
I have the hull of the Airfix BPB HSL assembled. I intend taking all the detailing off the deck and then building it probably as MASB37.
But then again...I have the deck of the Airfix Vosper sat in front on me, again with the intention of clearing all the detail off and building it as a Vosper Type 2. I have a bundle of goodies from Great Little Ships to fit it out, drawings of the QF 6pdr are all scaled to 1/72 ready to start scratchbuilding and I'm awaiting a parcel from John Lambert of plans with details of the Type 2.
As soon as I've made sensible progress and have something to show (on either) I shall start a thread.
I have to say I became a bit excited about the discussion in the Coastal Forces thread about RN Elco's and having spend a fair bit of time looking through ACF Vol 2, I set about seeing how easy it would be to convert the BPB HSL to a 70' Elco. Having scaled the plans of the Elco to 1/72, whilst the BPB and Elco appear very similar, the Elco is a much bigger boat in length and beam. It would be easier to scratchbuild a hull for the Elco than convert the hull of the BPB.
Cheers
Al