Singing front disc

[Mudder]

Assembled the RR 5 and the front disc was singing like a Mermaid at all speeds, stopped with slight brake pressure.  Backing off disc pad several click did mot help.  Inner pad constantly on the disc so centered the caliper and all good.   Now have to raise the handlebars for more upright posture, searching for a good riser.  Added the suntour suspension seat post, that 4 inches higher has me on toes when stopped.