How it works
4 Minute tutorial on how to use the tool.
Written Instructions.
Figure #1
Figure #2
Things to keep in mind.
(1) Each installer at every worksite is responsible for the design layout of the tongue & groove boards. The T&G Installation Helper aids in hanging the boards, not determining the design layout. Re-positioning the tool while securing the first three rows of boards is required and depends on how you layout your boards. In some builds, using 2 T&G tools can be beneficial to the installer. This all depends on the installers skill and needs for the job.
(2) When using the T&G Installation Helper on ceilings, the shorter end always faces the ceiling, and the long end always faces the floor. If used on walls, the shorter end always faces the wall, and the long end always faces the installer.
(3) Secure the T&G Installation Helper using a (not included) #10, 3 1/2" washer head wood screw on the rafter of your choosing. This depends on how your laying out your rows. The position shown in the photo below, the first board will rest on the tool, with the end flush up against the side wall, while the installer places and secures the other end.
All photos shown depict the pre-production T&G Installation Helper. The final design was made into a contractor grade, durable, plastic injected molded tool.
Secure the tool as shown when setting up the first row. This allows the installer to slide a tongue and groove board in the space between the open area between the rafter and the tool. This will hold one end of the board while the installer secures his end to the rafters.
Shown, is a T&G 1" x 6" x 12' unsecured board being held up with the T&G Installation Helper.
Once the first three rows are set and secured It is no longer required to secure the T&G Installation Helper to the rafters. It is then just used in between the rafters like a clamp holding the boards in place hands free. 
The design allows for the boards to be held in place by their interlocking design and the use of the T&G Installation Helper. Continue to repeat the process, which allows you to be hands free in holding the boards and allows the installer to nail and secure the boards as they work towards the end. The top piece design of the tool allows you to turn the installation helper at a 90 degree turn from the rafters and slide the tool out at the end. (This is if the rafters are at 16" on center or more). 
Finished ceiling using the T&G Installation Helper by solo installer.
The T&G Installation Helper can also be used to hold boards while boxing out beams. Secure the T&G Installation Helper to the bottom of the beam. 
Rotate the T&G Installation Helper and use it to hold up the board to be secured on the bottom of the beam.
Finished boxed beam using the T&G Installation Helper.
Completed build of barn by a solo installer using the T&G Installation Helper. This was the inspiration to produce the tool and give others the ability to do solo projects, or speed up projects where a crew could be utilized in other areas not just holding up one end of a board. Not shown, but the T&G Installation Helper was used to secure the wall boards. This barn is two story and used 6500 linear feet of T&G boards all done with a solo installer.