On Saturday, April 3, 2021 at 12:25:29 PM UTC-4, Andrew wrote:
As suggested long ago, Schweizer towhooks may be difficult to operate in the event of a kiting incident, and are much safer if installed upside down.. I have found a copy of an FAA approval (form 337) for doing this on a Pawnee. If anyone still wishes to do this modification, having this prior 337 approval will probably make getting FAA approval for the modification easier.

The 337 form, along with backup documentation, is at the following dropbox link:

https://www.dropbox.com/sh/u6skt3g1q...wmcZ3Edxa?dl=0
Thank you brother!