DIY RCA audio inputs with volume control to banana plug outputs module

I make quite a few audio circuits for fun. One module I always seem to need is the input jacks with a volume knob. I didn't want to have to rewire this circuit all the time for my Class A amplifiers and though I could build a little module to handle it. I used banana jacks on the output for ease of insertion with other modules that follow in the audio chain. The squares on the bottom are for LRFs (little rubber feet).