Hello, I recently aquired a nice 1939 Shadow Wave Vacumatic and started restoring it. I managed to take it appart almost completely (using the proper tools of course), but I have a huge problem with the Speedline unit. Though I have managed to get it out of the pen, I can find no way to depress the button, it's completely frozen. I've read that ink can corrode the aluminum, and the filler will weld to itself in time (this is probably what happened here as well). The question is, how can free the button? I have soaked the unit in Liquid Wrench for 2 or 3 days and no result, it's firmly 'glued' to itself. Any suggestion will be appreciated. Cheers.