Ok, thanks.

Although, my actual use case is: kwotski knows the approximate frequency of the two stations he's interested in listening to, swipes to the vicinity, and spends irksome minutes re-re-re-re- and re-swiping to try and land on the optimal reception frequency..

But I'll be happy to work round your improvements If the radio works (and it does, gloriously!) that's enough in the end. After all, once the right frequency is saved the game is largely won.