Reading post on internet come across a post about sparky racer.Poster says to calm the racer down ,block out ,95 to99 on back end and block up to 3 on front end.Tried it on test garden and it worked for me.Been detecting for about 20 some years running 7 different machines.Whites Fisher Minelab Garretts Makro racer 2 all sorts of different coils .Why did I not think to try that.?