Clip level is not closely related to lifter tab quality. Again, special tests and representations by the manufacturer are the answer. Our society seem to demand short, easy answers. Thoughtful discourse is replaced by four word bumper stickers. Fifteen second TV sound bytes are substituted for intelligent discussion.
Clip level is just a symptom of a deeper affliction.
Avoid this disease. Shortcuts are the problem, not the solution. Many resources are available that will assist you to attain both higher quality and lower cost. Use them effectively.