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A pitch gauge is an absolute must for collective pitch helicopters. It is unlikely you will be able to properly setup your non-micro CP heli to hover without using a pitch gauge.
For microhelis, MJP Carbon makes a microheli main blade pitch gauge. It is available from DeeTee Enterprises.
Ikarus makes a pitch gauge specifically for the ECO 8. For other non-micro helis, Century Helicopter Products makes a decent pitch gauge.