Merge pull request #609 from phq1910/patch-1

Update Configuration.h

Marlin/Configuration.h

@@ -32,6 +32,7 @@
 // 11 = Gen7 v1.1, v1.2 = 11
 // 12 = Gen7 v1.3
 // 13 = Gen7 v1.4
+// 20 = Sethi 3D_1 
 // 3  = MEGA/RAMPS up to 1.2 = 3
 // 33 = RAMPS 1.3 / 1.4 (Power outputs: Extruder, Fan, Bed)
 // 34 = RAMPS 1.3 / 1.4 (Power outputs: Extruder0, Extruder1, Bed)