I currently in the process of restoring my 11 Cab F8, during tear down it was discovered the king pin bearings were worn out (shocking!). This is a well known repair and is easily completed. When installing new bushings a Reamer is required to ensure correct clearance and alignment.
Since most people don't have the correct tooling, some websites are offering to sell said Reamer at roughly $150 USD as a option to add to the repair kits. As I am only planning to complete this repair once, I decided to search the Tool Crib at work to see if we had Reamers available. Luck was on my side and indeed we do have a complete kit available, to my surprise I also discovered the C Broad Arrow markings
It amazes me tooling from 1940s is till being used by the military to this day, if its not broken no need to replace it!