Resolve 155 by adding minimal but important extra notation for alternates.

hardware/dscomm.kicad_pcb

@@ -2,7 +2,7 @@
 
   (general
     (thickness 1.6)
-    (drawings 187)
+    (drawings 190)
     (tracks 1294)
     (zones 0)
     (modules 156)
@@ -6894,6 +6894,15 @@
       (solder_mask_margin 0.5) (clearance 0.5))
   )
 
+  (gr_text L (at 217.25 149.5) (layer F.SilkS) (tstamp 5FFD4B87)
+    (effects (font (size 0.7 0.7) (thickness 0.1)))
+  )
+  (gr_text L (at 219.3 152.1 90) (layer F.SilkS) (tstamp 5FFD4B3A)
+    (effects (font (size 0.7 0.7) (thickness 0.1)))
+  )
+  (gr_text 0 (at 217.5 152.1 90) (layer F.SilkS)
+    (effects (font (size 0.7 0.7) (thickness 0.1)))
+  )
   (gr_line (start 227.05 135) (end 227.45 135) (layer B.SilkS) (width 0.15) (tstamp 5FF5BEBF))
   (gr_line (start 226.25 134) (end 228.25 134) (layer B.SilkS) (width 0.15) (tstamp 5FF5BEBE))
   (gr_line (start 227.25 134) (end 227.25 133) (layer B.SilkS) (width 0.15) (tstamp 5FF5BEBD))