Thanks for the tips,
The plane will be covered in Sig Koverall and painted so sealing the covering is a non issue. I have plenty of space right at the center of gravity to mount the oil tank. I will get my initial test flight in without the smoke tank being filled to reduce the weight and get comfortable with the plane. I would be extremely happy with 10 minutes fo smoke. I don't plan on using the smoke all the time, just for showing off every now and then.
Thanks Again!!
Anthony