SLC 500 horizontal tank formula

Scaling

I do currently have it scaled 0-100% but that is not an accurate reading in lbs. This is a dairy plant and everything is figured in pounds so I am putting a whey product in it that weighs 8.46 lbs.
 
zip file

The zip file I am using ladder 5 and 10. There is a couple timers used to slow down the bounce for testing purposes and also so lines AFI out from other formulas. Also ladder 10 line 5 the second compute statement there is a *12.6 supposed to be 8.6. It got changed from trying to see how far off my formula is.
 
Still looking for help

Has anyone had a chance to figure out what step I am missing on my logic for tank level? I am still struggling. Thanks
 

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