how to make strong 3-way leg joinery with 2x4 / castle joint [woodworking]

I’m a carpenter in the middle of fifties. Woodworking is far from my major job. I may stand somewhere between hobby carpenter and expert. So my skill hasn’t matured fully and I make many mistakes in the videos. I hope you would forgive me generously. A late bloomer carpenter’s woodworking diary. This is the motto of my channel. I enjoy making furniture and videos. And using my leisure time I make videos and share how I make and my idea that comes to my mind. Those are sometimes childish and sometimes not too bad. What I want is you just enjoy watching one or two of my videos and fly to other channels better than mine. I’d like to progress my woodworking skills through struggle to make furniture and videos. And I hope those can help you encouraged for woodworking.