A vote is being held tomorrow night in Bethel on appropriating more money for police station construction.  Residents are being called on by the Boards of Selectmen and Finance to approve $889,000 to finish the project after HVAC, plumbing and electrical work put construction over budget.  Bethel officials have said that if money isn't allocated by May 15th, delays will start and that will add to the cost overruns.  The special town meeting is at 7 pm tomorrow in the Bethel municipal center.