Re: Gas tanks!!!
Check ebay for small motorcycle tanks or moped tanks, you'll need to make some brackets for them to fit, but won't have that problem with the studs pulling and causing leaks.
One nice tank that's fairly decently priced is the Suzuki JR50 tank, it's small narrow, and holds about a gallon of fuel, these can be had for between $35 and $75 depending on condition and the newer on es are plastic. The older steel tanks are really nice as well.
The 80's moped tanks work really well too, but can be quite pricy for a good one.