I installed the Tornado and have not had any buildup since. Easy self install. All you need is a hole saw (from Lowes or Home Depot), a phillips screw driver, some silicon adhesive and a few plastic ties (for the hose) and about 45 minutes.
Install adjacent to the "drop area" below the toilet on the side of the tank. Also, as before, use the chemicals to break up the waste. And last but not least, follow the recommendations of those above.
After installation make sure that when you start the water through the tornado start it slowly to give the spinner time to get up to speed as a sudden pressure surge has been known to blow out the spinner head.
This is an easy owner install, cost (including the hole saw and ties ) come under $20.00 in addition to the tornado cost.
Enjoy. (if possible)
Jim & Eileen
Silverado 1500 Crew Cab, 5.3 ltr, prodigy controller.
2009 Rockwood 2604.
Running mates Max & Kate Chihuahua's
Hobie Kayaks on Thule rack on truck
Retired Army EOD