If you look at the past spots there are a fair number of incorrect summits input. One of my recent spots was incorrect G/xx-nnn instead of GW/xx-nnn.
Possible ways of reducing the number of errors are:
Check that the input data refers to a valid summit and put up a warning saying “Summit invalid - do you want to continue” or similar
Change the inputting procedure to include the fixed - as well as the fixed /
ie use 3 boxes for association, region and number. It seems illogical to have the / fixed but not the -
If both of these were implemented I think there would be a reduction of inputting errors.
73 John GW4BVE