Wildlife Spotting

This large Katydid came to my light.I have tried to I.D.myself from the internet without success, so as a last resort I sent photos to Pisuth EK-AMNUAY of Siam Insect zoo and museum.In the past he has been very helpful with a good knowledge of Thai insects.But he tells me he does not know it and it may even be new to science.But it's hard to believe such a large and distinctive Katydid has never been recorded.( This is a male.)