Want to replace that regular 3PDT stomp switch with one of those nice “soft-touch” momentary switches? Here’s a vero layout for a latching relay circuit based on a schematic by R.G.Keen. This particular layout works with the dual coil latching relay from smallbear (NEC EA2-5TNJ) which is the one I used. Other relays may or may not work; have a look at the datasheet for the NEC and compare.
And here’s a picture of my finished circuit. Works like a charm.