You think you know the forward stroke, keep practicing! I have been paddling seriously for 20 years, and I am still working on my forward stroke. I watch video of myself and scrutinize pictures. I watch other instructors to see how they are teaching it, and looking for how it relates to how I teach it, and how I paddle. Do you really think your forward stroke is perfect? I didn't think so. Keep practicing, and if possible find an instructor to help you.