I have heard very good things about the lurker engienbolt (I may have just butchered that spelling). Sure, its worth it if you have the extra money. A lighter bolt will let your marker be more consistent, and the lighter bolt coupled with a spring kit will allow you to run a lower pressure in your mini. And by the way most upgrade bolts are made of delrin, so they will be lighter than stock.
Couldnt find toast, so I got myself a bagel.
04 prostock 'cocker blue Invert mini
'02 black cocker '08 gray/Green ego
74% of all statistics are made up.
He who knows not and knows not that he knows not is a fool. Shun him. He who knows not and knows that he knows not is a child. Teach him. He who knows and knows not that he knows is asleep. Wake him. He who knows and knows that he knows is wise. Follow him.--Persian Proverb