FirstEnergy's effort to convince state lawmakers that it must have more than $300 million a year in new customer charges to keep its nuclear power plants running is approaching a stall point.The Ohio Senate's Public Utilities Committee wrapped up its fourth hearing Thursday on the special nuclear funding legislation, without reaching a conclusion.In fact, most of the 13 members on the committee had drifted away by the time the last witnesses gave their testimony opposing Senate Bill 128.Over 40 witnesses have submitted written testimony, much of it in opposition. Many of them have then appeared before the committee to present the testimony formally and take questions from lawmakers.State Sen. William Beagle, a Tipp City Republican and chairman of the utilities committee, said there were still a few requests from opponents of the legislation to appear before the committee.