I have written up a proposed BIP. It has to do with Signature formats when using Bitcoin Private keys. It is here: https://github.com/cgilliard/BIP/blob/master/README.md

This BIP was written up as suggested in this github issue: https://github.com/bitcoin/bitcoin/issues/10542

Note that the proposal is inline with the implementation that Trezor implemented in the above issue.

Any feedback would be appreciated. Please let me know what the steps are with regards to getting a BIP number assigned or any other process steps required.

Regards,

Chris