first time poster. my name is Steven. i've recently purchased a used Sampson titanium road bike with Look carbon fork and quill type stem. it's stuck. previous owner claims to know nothing about it. i've drowned it with penetrating oil from top and bottom. i tapped the expander bolt with a hammer and the wedge dropped down the steerer tube. carefully put forks in bench vice with wood blocks and whacked stem with hammer on each side and bottom. still not budging. i'd like to save the stem but don't have to as i plan to use the one off my old bike. what's my next step? any help is greatly appreciated. thanks.