Thanks for the quick reply Whiskey!

the one that I couldn't get ( and is now destroyed, my bad it cracked all the way down) that one had a black mouth piece or what I thought was a mouth piece flush with the sides like on a cart it turned out to be attached. Inside that one and lower down was a white insert which came out with no problem.
the other one, which is working great by the way, had no inserts just a long black drip tip or dummy cartridge which easily was removed. that one I found works with both the 306 and 510 drip tips that I ordered. the other one seemed to small for either tip to fit.
Oh, and I apologize for not thanking Don and yourself for getting those orders out so quick even with the backlog. I got that stuff this morning and the banana-coconut and plain coconut juices are both excellent straight out of the mailbox.