I'm in the process of installing new stringers in my boat that I converting to an outboard. I was watching a video on the subject and the gut was putting foam tabs every 6 or 8 inches under the stringer before using thickened resin to bed the stringer in.I think the point of the foam was so the stringer wouldn't create a hard spot on the outside of the boat. My questions are how would this do anything if the stringer is resting in hardened resin in between the foam tabs? Also is this really necessary? The old stringers i removed looked to be bedded straight onto fiberglass with no cushioning. I'm going with straight Thickened resin with glass mixed in as per original construction. Any thoughts?