Wow! What was the symptoms of your wobbly blade? I just picked up a used Purple Ex19.. it was a complete dream - some really nice old timer retiring his hobby, and threw in a full carload of all his exotic wood, magazines, blades, intarsia patterns (I’m happy to give these away actually as, respectfully, intarsia is nice but not my thing).
I’ve been having some issues of losing tension while scrolling, as though the lever doesn’t lock into place. Maybe it’s just about me getting to know the saw better.