I had talked to Dave and told him the mods i have (head,nozzles,Pump wedge, rejet, etc) and told him i wanted some bottom end hit (of the skat swirl),but wanted to keep my speed of my current prop(solas XO). He came up with either a modified swirl or the Concord. He said the concord will help with the bottom end without scrubbing too much off the top. Think the pump wedge will help with keeping some speed. We will see!