Joe, don't forget that I am in England and that what you have there isn't necessarily the same as we have here. If I walked into our local hardware shop and asked for gun solvent I would get some rather strange looks.
I have already fed WD40 down the lubrication hole, I have yet to try a bit of paraffin, and I have already tried the hair dryer trick to try and get a bit of metal expansion. No joy yet. It can wait, I'm not going to bust my buttons over it.