Single vs multiple vibrators

i'm not sure how affective the portable ones are. but with those timptes with the big doors it really doesnt take much to get commodity to flow. I have a timpte with the big doors and i have one knock rail mounted vibrator and im a tight wad so i ONLY have one. I used wing nuts to mount it so i could move it from front hopper to back quickly. I havent moved it from hopper to hopper more than a couple times for some hot DDG so i wouldnt be surprised if those portables do fine. but timpte recomended the knock rail mounted to me vs the ones that stick to the slopes.

To me the permanent mount does a better job as all the energy from the vibrator is absorbed to the trailer. The portable one loses some of it's energy rattling around in the bracket.

Another plus to the permanent is that you don't have to string a hose around and carry the hose and vibrator in the side box.

The suction cup vibrators are a different story. I have no experience with them but there are several forms that discuss them.

Ah good point as I'm having steps put in. I spoke with my dealer and apparently the permanent vibrators get oilers so I suppose I'll be going with 2 permanent mounts and a portable for the front and back slopes!