The picture above shows my dodger in the foreground and my bimini behind. My main sheet is in the cockpit and prevents me from having canvas between the dodger and the bimini.
That bimini is attached to the boom gallows. It works fine to keep sun and rain off my upper body when standing at the tiller. When sitting, it shades me when the sun is high in the sky, but not when it's low.
The main disadvantage is low headroom. I'm 5'10 and my head just brushes the underside of the bimini when standing. I must wear a hat to prevent the bimini from wearing off the few remaining hairs i have on my dome.. Anyone taller than I would find it intolerable.
To correct that headroom problem, I've been wondering if I could order my next replacement mainsail with a 6" shorter luff, lifting the boom higher and then raising the boom gallows. Has anyone else done that? Would it upset the boat's balance?
Good luck.