Put the other symm at the back.
Put five ridged 2x1 at the back, and five at the front, on top of
other such pieces, as before.
Bag 16.
Put a F 2x1 hor on the front edge, skipping five columns from the
left (overhanging a little to the front).
Put a F 3x1 hor on top of the PP and to the right.
Put a F 8x1 hor to the right.
Put a F 12x1 hor to the right.
Put a 2x1 to the back of the rightmost button and to the right.
Repeat steps 1-5 symm at the back.
Bag 17.
Make a part. Put a F 2x1 from a sep bag (brown) hor on the table.
Put a F 2x1 (orange) hor on top.
Take a 2x1/2x2 from a sep bag (gray) hor on the table, the 2x2
side buttons to the front, and put the stack from step 1 hor on
top of the 2x1 bottom side. Put a 2x1 shelf piece hor on top, the
smooth wall to the front.
Mount a 2x2/2x1 hor on top, the 2x2 side buttons to the front and
to the bottom. Mount a F 4x2 upright, ver, to the front of your
part.
Mount a FS 4x2 on top of the PP. (These two pieces are divided on
the smooth side into a black and orange triangle, one left and
one right. Ask a sighted person to help with installation).
Repeat steps 1-4 to make two such parts.
Install one on the front edge, skipping three columns from the
left, the shelf to the back.
Repeat symm at the back.
Bag 18.
Make a part. Stack two 1x1 with handles, the handles on the same
side. Put a FS 1x1 on top.
Repeat to make two.
Install one on the front edge, skipping two columns from the
left, the handles to the front.