Buy from RCextreme power. It is only 13 bucks extra. You can work with them in case of a problem. Shipping from china will be a long wait and wil be expensive. If you have a problem forget about service of help from hobby king. They have their place. I accept that some of the stuff will be junk when I buy from them. A bad ignition will be very frustrating and not worth the 13-bucks saved. There is a possible safety risk. An erattic igniton could cause a kick back. You definately don't want to get you finger wacked. I did that a while back with a baulky engine. It caused perminent nerve damage.