Good advice so far but I'll add that I didn't like the provided socket at all with the required torque. I couldn't find a thin wall socket which would fit so I ground the outside of a 3/8" drive deep socket down to fit.

If you're not experienced with mechanical things like tightening bolts without a torque wrench, you may want to consider buying one because the ZDZ uses a tapered thread sparkplug and requires 15lb.ft of torque when you install the sparkplug. That's a BUNCH compared to other engines which use a more conventional washer setup with the sparkplugs. Using a tapered seat plug was NOT one of ZDZ's better ideas IMHO...