I have a Hyde Low Pro (14.7 ft long) fiberglass drift boat (approx weight 275 lbs) and mainly drift class I-II water (White river/Norfork river in Arkansas, Taneycomo/North Fork of the White river in Missouri, Pere Marquette river in Michigan) and have pondered upgrading my original oars (Carlisle 2 piece oars). My question is (for those of you who use or have used the Sawyer Square top hybrid with Dynelite wide or shoal cut blades)...will I really be able to notice a difference in the way the boat handles or increased efficiency/decreased arm fatigue with these oars? Is shoal cut the way to go? I am mainly in low water conditions with very very little technical rowing required (mostly back rowing to slow down and extend out drifts and avoiding rocks/logjams). What is everyone's impression/experience with the Sawyer oars? Thanks for your input.