I'm currently installing a multi-zone minisplit in my home. Unfortunately, I bought the cheapest linesets I could find. The 1/4" line has thinner walls and is very difficult to flare and torque down. The nuts keep stripping the flare when I try to torque to specs. If I torque to less than spec, and the lines still hold pressure, would there be any long-term detrimental effect to the system? I also heard that I should replace all flare nuts with thicker ones. Is that necessary?