yes...i push em in and twist em clockwise....i tried the hawk carttridges and they fit great

i recieved a response from ttech yesterday...and they said that after looking into it, that they did in fact screw up the new 'batch' of tubes/cartridges...(it was a little difficult to read, it was definately a chinese type guy who didnt have the greatest grasp on english, so he didnt say specifically if it was the tube, or the cartridges (or both) that were defective...he did say that he would be sending me new tubes and/or cartridges free of charge when the new shipment comes in in about 4 weeks...if that actually happens, i will be tickled w there integrity


ill let u guys know what comes of it..

thanks for responses...