Hi Len
Out riggers will give better stability but also give greater drag I would suggest cigar tubes (or similar) as the best option.
Your friend would have liked my past life, I was a project manager on some quite large construction sites.
I had a look at mba-dover and seen some very nice boats including Alans loyal moderator which I think is one of the best models that I have seen.
Bit of a shame that a photo of an odd looking airboat/game hunter combination has crept onto the site… is this some kind of nepotism?
Its just started snowing up here.
Paul