Drew, yes this worked for me and brought back the file and image buttons that use the Assets app:

if(profile == 'txtedit') {
  return { 
    buttons: ['bold','italic','underline','lists','link'],
    plugins: ['alignment','table','perchassets']
  }
}

I just couldn't figure this out and that was the detail I was looking for (adding perchassets to my plugins). Appreciate your help!

Thank you!