A new GEM based detector, with a novel support structure, based on ceramic elements, has been developed. The performance of 3 such modules will be tested in the Large Prototype TPC at the test beam 24 of DESY. In a previous test in 2011 we had some problems with trips in the GEM-planes. Several improvements in the construction of the new modules have been introduced. The detector will be readout using the ALTRO based DAQ system.