Here is the draft for distribution.
In addition to the customer-friendly  "looking forward to meeting with our business partners" language I know  you'll include, I'd suggest including something like the following:  Attached are drafts of the proposed tariff provisions (including the form of  Transport Option Amendment) and a filing letter.
We are providing these  draft documents to you in advance of filing them with FERC as part of a  good-faith effort to resolve any remaining issues with our shippers prior to  filing.
The drafts are for purposes of discussion by workshop attendees  only, and we ask that you not distribute them to persons outside your  company.
Additionally, while we hope that these drafts are close to being in  final form, they are of course subject to revision and final management  approval prior to filing with the Commission.

TW Options
Here is the draft for distribution.
In addition to the customer-friendly "looking forward to meeting with our business partners" language I know you'll include, I'd suggest including something like the following: Attached are drafts of the proposed tariff provisions (including the form of Transport Option Amendment) and a filing letter.
We are providing these draft documents to you in advance of filing them with FERC as part of a good-faith effort to resolve any remaining issues with our shippers prior to filing.
The drafts are for purposes of discussion by workshop attendees only, and we ask that you not distribute them to persons outside your company.
Additionally, while we hope that these drafts are close to being in final form, they are of course subject to revision and final management approval prior to filing with the Commission.
business partners language providing draft documents suggest including like distribution addition friendly looking forward discussion workshop attendees close final form ferc outside tariff