Hey Guys,
I'm essentially an electric guitar newbie but growing well. A couple months ago I got me a new Digitech RP355 multi-effects pedal ($200). It really was a snap decision, a guitar buddy had a lower model so I got me a higher model But now, I've began to experiment with amps, delays etc and sadly I found that the RP doesn't have a tap-delay function (to cover a couple U2 songs). Any ideas on how I could get a tap-delay pedal/solution hooked up to the RP, OR do I have no choice but to upgrade? (RP500 has a dedicated tap-delay pedal)

Please help.