this one s been around for awhile….
problem: DL4 has to be manually switched into LOOPER mode
solution: modify rotary connection and connect a dedicated stomp switch for instant switching into LOOPER mode
caveats: DL4 automatically engages PRESET 1 when returning to DELAY mode (choose your presets wisely)
(pics say it all – no descriptions necessary)
(show a little more care for mounting hole placement than I did)