I make my first bevel

I had to bevel the seat cleat on the transom for the rear seat. This is a harrowing proposition for me because, a: I do not know how to bevel things, and b: I do not want to screw this up too much because then nothing will fit. Fortunately, I had the mind to ask over at the Storer woodworking forum first, and basically, I take my hand plane to it and plane away. So that's what I did, and I successfully beveled my seat cleat the 4mm. PHEW! Not so bad! Of course, I say that now. Time to start learning how to keep my plane blade sharp. Here's a pic, but the cleat is not oriented in the correct position, worry not GIS fans!