diff --git a/app/helpers/rating_engine/ratings_helper.rb b/app/helpers/rating_engine/ratings_helper.rb
index 853c817..9a2da5b 100644
--- a/app/helpers/rating_engine/ratings_helper.rb
+++ b/app/helpers/rating_engine/ratings_helper.rb
@@ -1,7 +1,8 @@
 module RatingEngine
   module RatingsHelper
     def star_rating_for(rateable, params={})
-      enabled, show_score = params[:enabled].nil? ? true : params[:enabled], (params[:show_score] || true)
+      enabled = params[:enabled].nil? ? true : params[:enabled]
+      show_score = params[:show_score] || true
       current_score = show_score ? score_in_pixels(rateable.average_rating) : 0
     
       render :partial => 'rating_engine/ratings/star_rating', 
@@ -10,15 +11,21 @@ def star_rating_for(rateable, params={})
     end
   
     def score_in_pixels(current_score)
-      ((current_score * 125.0)/RatingEngine.max_score).round
+      (current_score * RatingEngine.star_length).round
     end
   
     def rating_url(rateable)
-      if rateable.rated_by?(controller.current_user)
+      if current_user.nil?
+        ""
+      elsif rateable.rated_by?(controller.current_user)
         eval("#{rateable.class.to_s.downcase}_rating_path(#{rateable.id})")
       else
         eval("#{rateable.class.to_s.downcase}_ratings_path(#{rateable.id})")
       end
     end
+
+    def star_left_padding(score)
+      score_in_pixels(score) - RatingEngine.star_length
+    end
   end
-end
\ No newline at end of file
+end
diff --git a/app/views/rating_engine/ratings/_star_rating.html.erb b/app/views/rating_engine/ratings/_star_rating.html.erb
index 81666b0..814d18d 100644
--- a/app/views/rating_engine/ratings/_star_rating.html.erb
+++ b/app/views/rating_engine/ratings/_star_rating.html.erb
@@ -5,11 +5,11 @@
 		<% if enabled %>
 			<% (RatingEngine.min_score..RatingEngine.max_score).each do |score| %>
 				<li>
-					<a href="#" title='<%= score %> stars out of <%= RatingEngine.max_score %>' style='left:<%= ((score) * 25) - 25%>px'>
+					<a href="#" title='<%= score %> stars out of <%= RatingEngine.max_score %>' style='left:<%= star_left_padding(score) %>px'>
 						<%= score %>
 					</a>
 				</li>
 			<% end %>
 		<% end %>
 	</ul>
-</div>
\ No newline at end of file
+</div>
diff --git a/lib/rating_engine.rb b/lib/rating_engine.rb
index d3adf12..b9ce605 100644
--- a/lib/rating_engine.rb
+++ b/lib/rating_engine.rb
@@ -12,6 +12,9 @@ module RatingEngine
   mattr_accessor  :min_score
   @@min_score = 1
     
+  mattr_accessor  :star_length
+  @@star_length = 25
+    
   def self.setup
     yield self
   end
@@ -22,4 +25,4 @@ def self.setup
     require 'rating_engine/engine'
   end
   
-end
\ No newline at end of file
+end