I don't know how long this has been broken because no one mentioned it, but I just noticed that this setting wasn't doing anything. It now works the way it was intended and will update your position at [cast time] - [casting movement hack correction] (e.g. 2.5s casting time with 200 correction will update your position at 2.3). 500 seems too fast for me, but 400 works well. It will be based on your ping and is easy to test by running around and healing yourself.
This requires updating Speeder to the newest version.
