Continuous mating surfaces

I'm doing a model of a contoured speargun handle. There is abit more to it than your squeezy bottle grip. I've modelled fingergrips with a surface loft and a number of guide curves. Featuresfrom the rest of the handle like the back need to blend in withthis first loft so that the join betwen them is smooth andcontinuous. Any suggestions on the best way to do this?SolidworksSurfacing