A boost effect can be easily achieved using the Filter block. Simply set TYPE to NULL and adjust the LEVEL control for the amount of boost desired. Bypass the Filter for normal operation, then engage it for a boost. For a gain boost, place it before a Drive or Amp block. For a simple volume boost, place it after those blocks or at the very end of the chain. Keep in mind the boost will push the drive in a Delay placed after it, but cutting the volume of the output of a delay or reverb could sound unnatural.