The warp comes off a spool or cone rack and preliminary tension, that serves to take up slack and reduce tangles on the tensioner input rods, is applied by section A.

Section B, comprised of the three input rods, the spring-loaded sandpaper drum that provides the tension (covered with Saran in the picture - helps protect the surface when not in use), and the three output rods is the standard Louet tension device with the mounting clamp and the yardage meter removed.  Instead, a Trumeter yardage counter 'C' is mounted to rest on the warp threads coming over the drum (the single fiber wheel on the other side of the Trumeter is for spooling warp thread).

Section D is a home made Heck box made using Texsolve heddles.

Section E is a short reed and mount from the front of an AVL tension device. Note that the reed can pivot about a vertical axis, to allow for the space taken up by the sectional pegs on the beam.  To explain further: Two inch sections usually are separated by 1/4" dowels.  Thus each 'two inch' section is really only 1 3/4" wide.  If, in this example, we are warping at 24 epi and double sley in a 12 dent reed, the width of the sheet coming out of the reed is wider than the allotted space on the beam.  By rotating the reed the width of the sheet will become narrower (good old cosine law) so, by adjusting the reed rotation, a 1 3/4" width for the sheet can be achieved.  (A double sleyed 15 dent reed would also serve the purpose, but does not give as much control on the actual width as the rotation does).