Ok, I did the mod only this time using thin walled tubing to isolate the impellor. The pump does have problems starting, it takes about ten seconds and makes a helluva lot of noise, but because I run it 24/7 I dont have to worry about it starting. There is definitely no more rattle and all I can hear now are the numerous air bubbles which should disappear in a few days. Here is a simple pic of what I did, it doesnt completely isolate movement, but definitely helps with the rattle. Plus it is instant and I didnt have to wait for any glue to dry, and I dont have to worry about chunks of glue in the system.
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I have a nice computer.
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