I just wanted to update anybody who is looking on this thread….
We’ve recently developed a mod for the VPM-1 that allows it to fit into the larger Ernie Ball volume pedals, not just the Jr. line. See the VPM-1 Large Format Adapter page for more info…https://zeppelindesignlabs.com/product/vpm-1_large_format_adapter/
-Brach