Hey Rusty, I’m a complete noob at welding but in what I’ve done so far I prefer by far is to have a tight joint and butt weld. It takes a lot more time to slowly sand away material to ensure your butt joint is tight but to me it’s much easier to weld than a lap joint and there is no gap for moisture to get in. I’m sure there’s people on here with far more experience than me that will guide you better, good luck!
