I will suggest, as always, that you build the kit in the stock configuration before you modify anything. It is possible to remove the balance control and install a different attenuator, that's what the TwoQuiet mod kit does, with separate coarse and fine adjustment switches. It would actually be a good exercise in DIY modification to work out for yourself how you would do it, since it is not too complex. Post your modification plan here and we can look it over and offer suggestions.