I'm not ordering a laserlye product again - LaserLyte Laser Trainer Pistol Cartridge

I have numerous Laserlyte products including Nine Knock down Laser cans. a Scoretyme Target and Laserlyte Cartridges. The Laserlyte 9mm Cartridge will not work I believe because a mylar Sleeve is missing that would prevent the batteries from rubbing against the cartridge tube sides. Laserlyte send me a replacement sleeve but there is no way it can be inserted, it is a flat piece of clear material that can't be placed within the cartridge to protect the batteries from touching the sidewalls of the cartridge tube.
I found that I could in fact carefully wrap ordinary scotch tape around the three 377 batteries and the thin scotch tape will allow the batteries to fit into the cartridge and the cartridge works. It works but what a frustrating process to utilize scotch tape. I would also emphasize that the Cartridge will not consistently score the $300.00 plus ScoreTyme target. The target won't record the hits half the time and it will at times show double hits on the target. I'm not a happy camper when it comes to Laserlyte products. I would point out that I tried out three Laser Trainer Pistols and all three were defective after working for about twenty or thirty shots. Bottom line: Laserlyte products for me get a poor grade in that they fail to operate and they are very costly. I for one find it hard to believe that there are those that are very satisfied with LaserLyte products. I'm hoping that Laserlyte will respond to my dissatisfaction with the Cartidge and offer assistance in what it takes to have a functioning LaserLyte Cartridge.