You’re getting there, I must say. You did mention that the leak from the gearbox diminished after a while and looking at the pictures, you likely have the original leather seals, which once soaked again in oil, may have swelled up a bit. I’d drive the car around for a while and maybe the leak will get to a point you can live with. But to fix it, it’s best to pull the engine right out and not mess with it in the car. Easy to damage the sump if you’re not very careful.