I'm an old T-25 guy (but mostly old). If you've ever accidentally dropped the stapler, you may find that the guide towards the end has become distorted. I have always just taken the slide out, eyeballed it edgewise, and looked to see if the |_| shape is still intact. I've always found that the "walls" are bent slightly inward and that the narrowing is what jams up the stapes. Enter my needlenose, light oil and cheap sensibilities. My billion year old T-25--with it's rubber grip long gone--will go again without fail until some old guy drops it again.

"Press play and record at the same time" -- Tim Alberstein