Quote from Total SS on the WFTF 2017 thread:
"There were many shooters who said that having a windicator makes you lazy and inhibits your wind reading abilities. Wian spoke to John Costello and asked him what he did to prepare for the Worlds after his two year break and only having three months to prepare. John told Wian that he put in trigger time and that he shot without a windicator, and only put one on for Worlds. Read between the lines, we need to start using the environment as our indications as to the wind".
Whilst I haven't shot FT for a few years now, I would strongly agree with this. Dangling a bit of string or whatever off your rifle is not going to make you a better FT shooter. The only real way to understand how to shoot in the wind is to shoot in the conditions and learn how to read it based on the environment in which the targets are laid out.
During my active years in FT, I noticed that it is very easy to get caught up in the idea that all manner of gadgets will lead to success, to be honest very few will give you any real benefit.
The only gadget that I consider an essential is a spirit level to prevent canting, other than that many other items can just be smoke and mirrors distracting you from the job in hand.
In the videos from the Wales event former three times WC Nick Jenkinson made a very valid point - practice, but make sure your practice is quality, not just quantity and practice your weaknesses not just your strengths.