I recently picked up an old Senator, but it does not open like my Super Speeds. The bottom of the handle twists downwards which unlocks (but does not open) the doors, and then I have to push up to get the doors to open. I can then insert a blade, pull down to close the doors, and twist to lock. The twisting motion does not open the doors, but rather pushing upwards. Having never seen one, I wondered if this was how it was designed, but videos I've found make me think that it's supposed to open like a SS. I wonder if something is broken.