I don't think it is necessary. I have the MT4 with 1258tg in my rides, and if they are set up for full transit speed, they are twitchy as hell. I can't imagine needing less latency or quicker response time. I have to tone it down as it is already.

You may be different, but I think your current setup is going to be about as good as it gets. Spending all that $$$ on the Airtronics servo is likely to be a placebo.