Walls allows the use of prefixes so that every station in a project does not need to be unique. For example, BP25:T3 would be station T3 of trip BP25. Cavewhere just renames this BP25_T3 which is not really the same thing. The survey file for BP25 would have the station as just T3 while a follow on survey that tied T3 would have it entered as BP25:T3. Renaming BP25:T3 in the tieing survey as BP25_T3 would foul up the tie unless the original T3 was also renamed BP25_T3 everywhere it occurs.
Walls allows the use of prefixes so that every station in a project does not need to be unique. For example, BP25:T3 would be station T3 of trip BP25. Cavewhere just renames this BP25_T3 which is not really the same thing. The survey file for BP25 would have the station as just T3 while a follow on survey that tied T3 would have it entered as BP25:T3. Renaming BP25:T3 in the tieing survey as BP25_T3 would foul up the tie unless the original T3 was also renamed BP25_T3 everywhere it occurs.