Jemel Johnson volleyed home an Alex Luis corner on 15 minutes, but the Moles were frustrated for the remainder of the first half.
However, they put their opponents to the sword in the second period, initially doubling their lead thanks to Aaron Rowland’s finish from a Josh Pearson cut-back.
The Moles dominated from that moment onwards and after a 65th-minute penalty was saved, Seb Bowerman won and scored another spot kick two minutes later.
Johnson added his second after Jamie Connor’s header was parried and the Moles cruised home.
Roger Herridge’s side will take on either his former club Wokingham & Emmbrook, or Marlow United, at the Madejski Stadium on Sunday, May 17. Those two sides meet in the semi final on Tuesday night (7.45pm).
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