The vendor did send me a new box and I have not had any problems with these at all. Let me know where you all are getting your stuff to rebuild, I'll have to reseach this. I just got a MAP tank but only 2 pre-cut CE2s, I have several clear CE2s but I understand that these can not be used. I don't want to spend a ton of money buying the pre cut ones at over 4 bux for one, so someone has told me you can cut and solder them onto the center post of the exisiting Pre-cut. I am going to try it and see if I have the ability to actually do it.