Small fix = big job

Remember those labs where you had to deal with a combination lock? Well these locks have been giving Students, Teachers and lab Tech's headaches for years. Either the combination or the universal key doesn't work. They are ancient, probably made in the 50’s! The cost to repair them is approx $50 each through a locksmith, if we took them off for them, and the guarantee is only 30 days.
Today is the day these locks go to the pile of good ideas gone bad within a few months and are pains for the next 25 years.
I designed and built a jig, out of aluminum scrap, to drill the holes in the exact place necessary. Since I have to do this whole lab of 55 drawers and doors a jig is by far needed. It took about an hour to drill all the holes. Now for the work getting into the drawers and doors with faulty locks…