You can minimise the effects of print-thru by keeping the tape away from extremes in temperature and humidity. Most effective in reducing the APPARENT print-through is the technique of storing tapes in 'tales out' configuration. This means, at the end of the session, fast forward instead of rewind your tape on to the reel. This is done to make the print through occur after the start of the recorded piece. Actually, to hear some print through, get a copy of Mariah Carey's song: "Now that I know". It can be heard between the end of the piano intro, and the start of the more racey dance segment. As far as breaking goes, the tinner tape will have a lower yield and breakage figure, but compared to old acetate and earlier polyester, it's as strong as the proverbial oxe. Just make sure the brakes don't snatch at the reel tables and you should be OK.