I've mounted the engine on a custom motor mount which allows much easier and finer adjustments. Found it on Ebay a while back when the guy was first making these. Very reasonably priced at the time. I still see them occasionally, but for a "buy it now" price, about 30% more then what I paid for it. I've mounted the engine so that I have plenty adjustment up or down from where I have it now, which is about 1/16" above the bottom of the sponsons.