I am currently using method 4 on a frame after trying most of the above. However, i have taken off most the post above the seat tube. It's time consuming but seems to be working bit by bit.
Top of post came off when clamping it in the vice. seat post is very brittle so, removing it piece by piece. It seems silly but is literally the only way possible.
I am currently using method 4 on a frame after trying most of the above. However, i have taken off most the post above the seat tube. It's time consuming but seems to be working bit by bit.