Hey man, it's very common in my trade to get butthurt when a customer wants to do their own electrical and save some money. Rather than let you do something potentially dangerous and hurt yourself, I'll share whatever information I have, regardless if you're going to hand me money by the end of it. Call me old fashioned. According to the National Electrical Code, you're not really supposed to bond your grounds and neutrals together, unless you're at the main disconnecting means of the service. The reason being, if you have any objectionable current flowing on that neutral, the way you have it wired right now, you risk energizing the equipment ground, and thereby the chassis of the dryer. This could get you shocked, or cause arcing.