I am mixing for various weekend warrior bar bands as a noob/amateur going on a year now. I typically mix approximately 1 show per month so my experience is limited to maybe 12 shows total. One band that I mix for is limited to a single effect in their Mackie ProFX16V2 but could potentially be improved with an external effects unit. This band usually only sends vocals through the PA but recently I started adding kick to the main mix (no effects) and on rare occasions there has been a second keyboard with no amp on stage so that person relies on the monitors (again, no effects since they are internal to the keyboard). There is only one effects send attenuator per input though so there is an inherent limitation in the level control on the send side even if both internal and external can be used together. The monitor sends are both in use so I cannot dedicate one for external effects without ganging the monitors. I could potentially do that and am considering it but not yet, not until I determine a need. We use reverb for all the songs, but some songs would benefit from the addition of delay/echo. Reverb and echo seem to be the most popular vocal effects and they are commonly used simultaneously to varying degrees in the original versions of the material I mix for this band, with the delay/echo typically being turned up/down or on/off for various passages in classic rock rather than consistent. The delay time also changes depending on the material, as does the regeneration. So what I am after is an external delay/echo that can be operated on stage by the vocalist with a foot switch and/or pedals, like a guitar multi-effects box, and patched into the external FX loop on the mixer. That puts control of the delay/echo directly into the hands (or feet) of the vocalist, where such person can express his/her own creativity independently of me, relieving me of that responsibility plus any need to memorize the cues where the delay needs to turn on or off. If anyone has experience or recommendation that would be helpful? Any outboard FX is going to require a purchase so I would appreciate some advice on choosing one, as well as some indication of whether to use the internal FX as a delay with a footswitch (it has an input jack for the switch) or the external FX with its built-in controls and potentially much more flexible functions (delay time, regeneration) being available to the vocalist also. Thanks in advance for your responses.