try to richen the bottom end. it is possible that the climate is much colder than when you run the last time. the more dense the air (the colder it is) the more fuel needed hence it may be running lean at idle causing the idle to be higher than normal.
Serpent - Walter RC
Serpent E Power ..... Serpent 747 Reds M3T
Serpent 966-TE Reds M7T .... S411ERYX Speedpassion 3.5T, T-Shox
Serpent 811-TE REDs R5T