I just received a request for the specs for the cores for a No 1 Reprex. this is the same one posted on Briar press. I will make a drawing and share a pdf on this site.
– overall core length
– diameter and length at ends
– other diameter and length on the core
– position end to end and length of rubber on the core
– diameter and number of teeth on gear––– ideally a scan of a rubbing or print of the gear
– note any flat spots for set screws or woodruff key