Sounds smart! best wishes

Howard, I can't say I've had experience with this but I feel for you! In what way is the size wrong, too tall, too thick?

I'm thinking maybe experiment with pushing on the middle area of the card edge a little while pulling. In theory, the card might flex enough that the sides will release and you can get it out.

I accidently picked up a small card from my old Brother/Bernina Deco collection & it went all the way in before I realized what I had done....the release button on the machine did not even pop out & I'm not able to grab onto the card, even with a long tweezer...I even tried tilting the machine on it's side hoping it would slip out even a bit for me to grab on to.......

Oh my! Next, find a way to stabilize the machine in a sideways position, so gravity can help you, and try the release button a few times. Then, if that doesn't help, ...I don't know if you're comfortable with opening the machine's shell, but that may be the next step. Or a trip to a sewing machine shop, so they can dislodge it for you.