03-21-2014, 10:37 AM
Hippos usually have rubber wiring. Did you replace any wires, or cover them with heat shrink? If so, check the routing of the wires. Sometimes solving a squeal is as simple as moving a wire 1/4 inch. If this isn't the trouble, i think your alignment might be a little too "hot". Like Chuck said, un-align it a little and see if the squeal stops.
The artist formerly known as Puhpow! 8)