Hi Chris
It sounds like you are speaking of a pedal board rather than a controller.
The PK7 has always been a quality board for 20 pedals. I have used the Fatar here for years.http://www.studiologic.net/mp-113.html
The Fatar is only 13 pedals, and the quality is not as good as Roland's, as far as sturdiness is conscerned. However, it only cost me $375 twenty years ago.
Setup is easy. Move the switch by the midi sockets to bass. To fine tune it, so to program menu/sound/part setting/lefthand part/scroll down to bass pedal. This adjusts the volume etc, and can be saved in a panel memory with your other settings.
Bernie
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact