Has anyone used these Tempa-flow regulators on their sled. I'm intersted in putting one on my zr700. Do they work or are they finnicky? What's the downside of them?

Look on page 2 or 3, there is a recent thread. There is another thread way back there. haven't heard any negatives about it. That would be pg 2 or 3 in the General Snowmobiling section, not A/C

Thanks!