Thanks for the additional feedback guys. I have updated the first post with a couple of extra things to try and fix the flickering. I haven't upped the version number so you won't have to re-do the config.
Let me know how that improves things (if at all).
Looks about the same. Might actually be a slower flicker now like there is some type of a pause or DoEvents call after each element is added. Posting the code used to update/add the elements may help suggest other ways to do it.