Have been suffering from stripped thread of my Vamo V5 for some time. Today I tried cutting a thin strip from a band aid and sticking it inside the 510 treading on the Vamo. It worked like a charm. My kayfun lite clone screwed in perfectly. No wobbling. Sheer luch may be. Thought of sharing with everyone. Do try and let me know if it works for other Vamo's with similar issue.