Thanks for the help guys but still believe it is static everything is balanced fine as stated before no problem with FM I have taken blades off to test and get the same problem however someone told me to try wd40 on belt and main gear this seems to be doing the trick on the last couple of tests need more testing to be fully confident , an electrician friend of mine advised me that for static to arc it has to be around 10,000 volts and will KO any system all I can image is that it must of been happening with the FM system but was more tolerant than the spectrum system