There's a new calculator on blocklayer.com that creates full scale oval templates to use when cutting sheeting for pipes that pass through on an angle.

Pipe at Angle Through Sheeting - Full Scale Oval Template Generator - Metric

Enter the pipe or tubing OD, pipe angle and sheet thickness and it draws the full scale oval, and a cross section showing the pipe through the sheet.
It enlarges (lengthens) the oval to allow for sheeting thickness, as can be seen in the scaled cross section diagram.
There's also a triangle diagram with dimensions to set the pipe at correct angle from sheeting.

Please let me know if anything needs to be added, edited or fixed.

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