A very big gamble in my view, as he'd stated that his LBS had tried to remove it and failed.
I hope they didn't damage the frame and you have some joy in getting out, the shame is that the seatpost will be ruined and you'll struggle to find another to replace it.
The parts are worth £200 though so not much of a gamble. I've disolved alu seatposts before with some chemicles so should be gud.
The parts are worth £200 though so not much of a gamble. I've disolved alu seatposts before with some chemicles so should be gud.