yes they are to big to pinch now. you have to catch it when it starts lol. fox tailing looks kinda cool but you have to stop it so the buds can fatten up more. man i was so high all day yesterday.
IMO you dont want to pinch the buds late in flower like that. When they are late in flower you dont want the plant to have to repair itself.
To each his own I guess. Something that would gain weight more is flushing and getting those green leaves to start a good fade.
I noticed in your broken branch bud that the leaves are still very green. How many days are you at now?