Angle iron provides a stronger installation and reduces vibration, which helps extend the opener’s life span. In an unfinished garage, attach the angle iron directly to the face of a joist with 1-in. lag screws. For finished ceilings, attach angle iron along the bottom of a joist with 3-in. lag screws. Hang the opener using two more lengths of angle iron and nuts and bolts. Use lock washers or thread-locking adhesive to keep vibration from loosening the nuts.
The parts, parts, parts trick: You might be told you need new rollers, cables, drums, bearings, etc., when you don't, or at highly inflated prices. Good questions to ask when first calling for service include, "How do I know you will only charge me for the parts I actually need?", and "If you don't have all the parts I need, what will you charge me to come back?"
Your ad had no cheap coupons or promises.. Just business. Service was more than prompt. No attempt to fix something that was not broke or did not try to sell me anything I did not need. He stated the price at the beginning and stuck to it. (I was so pleased, I did not bother to mention a senior discount.) Very, very pleased that I have found someone I can trust and rely on. GaryRichard