Hello, I have a grubee 66cc kit. I noticed in many threads people having problems with air leaks on their engines causing the engine to not run right. When I pulled the engine out of the box I thought I should check how tight the hardware was. Most of the screws didn't seem tight enough so I cranked them down tighter. Also some seemed tighter than others. I was wondering if any of you guys replace all of the engine hardware with allen hex bolts and if tightening all of the hardware like I did was a good idea? I was hoping someone would have a list of the hardware so I could go buy them without having to take each bolt to the store and figure out threads by trial and error. I guess what I am getting at here is I am trying to make this thing as bullet proof as possible. Do you have any other ideas to make it as reliable as possible. I don't mind putting a lot of extra work into the build so that when I am done I can just ride without as many headaches as possible. Thank you guys in advance!