I have a 400G block I want bored .125 over need to sonic test first no one around me does it anymore. Closest is a 4 hour one way drive. Any suggestions on a affordable sonic tester that will work? Have seen some on ebay for 80-100 bucks but don't know if they will do the job looks like they are made mostly for flat metal? Suggestions anyone or anyone have an extra they would loan out I will pay shipping both ways?