Tips for trimming adhesive around brake controller

[navyseal334]

Have the dealership install a Curt Spectrum brake controller. Unfortunately they did a garbage job of trimming the adhesive pad behind it. Not sure if I trust them to do it right if I take it back.

Does anyone have any recommendations for how I could trim this up so the adhesive isn't visible? I worry a box cutter will cut the trim piece behind it.

 

[B-train]

A good sharp blade and steady hand will trim that right up. It's all plastic behind there, so you'll be fine

 

[Doubeleive]

It's got to be just screwed on there or something. Take it off, fix it and put it back on

 

[StephenPT]

The rotary knob just snaps into the base plate. I'd remove it, then remove the base plate and trim the gasket.

 

[STORMIN08]

if you choose not to remove, a sharp blade at the correct angle will trim it right up.

just angle the blade to cut slightly into and behind the trim ring