10/16/2020
Did a soap bubble check after pressurizing the tank to 1 psi. I noted the temperature and used the ideal gas law as a reference (PV=nRT simplified to PV=T) and monitored (time lapse) for a day. Pressure held.
10/5/2020
Moving on to removing the leading edge tanks for pressure/leak check. After a successful check I will rivet to to wings. The only problem is that it seems some one at the factory was a bit careless with some adhesive and glued the tanks to the wing!
After consultation with a mechanic he suggested working some solvent in the seam with some really thin aluminum sheet acting to cut through the errant adhesive. After about 4 hours the tanks were successfully freed from the wings and the setup for the tank test was started.