I play in a band in which the other guitarist has an RC booster pedal, by Xotic Effects. It always sounded good in terms of tone, but the boost itself seemed rather weak. Then one day someone suggested putting it after the amp, through the send / return. Amazing difference! It actually boosts with that setup! Any reason why it would work there but not between the guitar and the amp? As far as I know, there are no switches or anything on the pedal that would affect that.... Any advice much appreciated; we gig in various places and don't always have access to amps with a send / return capability. Thanks.