This Hirobo seesaw carries model number HI0304112 and is offered as a direct replacement linkage item for EMBLA SZM2 RC helicopters. The focus here is on fitment, installation guidance, and the seesaw's influence on control input geometry rather than on unspecified metrics.
Use the part when renewing linkage hardware or restoring correct control geometry during maintenance. The seesaw sits in the rotor control train and will affect cyclic and tail response depending on linkage lengths; check control throws and neutral positions after installation.
Before flight, ensure the HI0304112 part matches the required service code for EMBLA SZM2 and reverify servo centring and endpoint settings following reassembly.
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