Hey T-jet, I am also paranoid about sharp objects as well. Here is my solution. Use a six-in-one screwdriver, broke down the danger of a puncture wound is gone. My tire irons(small) and any wrenches are wrapped in rags. I use rubberbands made from old front tire innertubes to hold the rags and wrenches tight(they also work great for trail repairs). This packs the tools tight and leaves plenty of room for fist aid/survival kits, extra gloves, plugs and parts,etc. Also I wear my pack over my chest protector. After having many get-offs with this set up, I have never had an injury from the pack!There have been a few blown water bladders though. I also have used fanny packs(IMHO..they suck), rear fender packs(they get in your way on down hills and do not have enough room), and the front fender bag(also too small and stresses the front fender mounts, breaking the fender). Hope this helps.
