Proposed changes

This is what I did yesterday:

- basicly gave the tests more comprehensive names; put all the
declarations at the top; got rid of the magic negative C-value (renamed
to P + A, O, T)

- "cos(RADIANS(180 + 30 * axis)) * (1 + circles * 0.1 * ((zig_zag) ? 1 :
-1)) * delta_calibration_radius" compiles wrong is zig_zag statement is
without brackets

- DELTA_TOWER_ANGLE_TRIM reset to 3 values (the calcs use the 3th value
to normalize will not compile otherwise)

-Wrote 3 dummies to keep EEPROM lenght the same

-Reset the configs to the 'original' with autocal + menu disabled (but
can be enabled of course)

Marlin/configuration_store.cpp

@@ -42,7 +42,7 @@
 #define EEPROM_OFFSET 100
 
 /**
- * V33 EEPROM Layout:
+ * V35 EEPROM Layout:
  *
  *  100  Version                                    (char x4)
  *  104  EEPROM Checksum                            (uint16_t)
@@ -410,8 +410,10 @@ void MarlinSettings::postprocess() {
       EEPROM_WRITE(delta_radius);              // 1 float
       EEPROM_WRITE(delta_diagonal_rod);        // 1 float
       EEPROM_WRITE(delta_segments_per_second); // 1 float
-      EEPROM_WRITE(delta_calibration_radius);  // 1 floats
+      EEPROM_WRITE(delta_calibration_radius);  // 1 float
       EEPROM_WRITE(delta_tower_angle_trim);    // 2 floats
+      dummy = 0.0f;
+      for (uint8_t q = 3; q--;) EEPROM_WRITE(dummy);
     #elif ENABLED(Z_DUAL_ENDSTOPS)
       EEPROM_WRITE(z_endstop_adj);             // 1 float
       dummy = 0.0f;
@@ -778,8 +780,10 @@ void MarlinSettings::postprocess() {
         EEPROM_READ(delta_radius);              // 1 float
         EEPROM_READ(delta_diagonal_rod);        // 1 float
         EEPROM_READ(delta_segments_per_second); // 1 float
-        EEPROM_READ(delta_calibration_radius);  // 1 floats
+        EEPROM_READ(delta_calibration_radius);  // 1 float
         EEPROM_READ(delta_tower_angle_trim);    // 2 floats
+        dummy = 0.0f;
+        for (uint8_t q=3; q--;) EEPROM_READ(dummy);
       #elif ENABLED(Z_DUAL_ENDSTOPS)
         EEPROM_READ(z_endstop_adj);
         dummy = 0.0f;
@@ -1066,7 +1070,7 @@ void MarlinSettings::reset() {
 
   #if ENABLED(DELTA)
     const float adj[ABC] = DELTA_ENDSTOP_ADJ,
-                dta[2] = DELTA_TOWER_ANGLE_TRIM;
+                dta[ABC] = DELTA_TOWER_ANGLE_TRIM;
     COPY(endstop_adj, adj);
     delta_radius = DELTA_RADIUS;
     delta_diagonal_rod = DELTA_DIAGONAL_ROD;