Leaking water heater question

My previous 29ft Jayco had a hot water tank leak. Leak appeared at bottom of its tank but to my surprise, it was a loose pipe connection at its rear hidden side. And the slow leak was running down the rear back of its tank and dripping at its bottom. I simply got access to its rear and hand tightened its rear plastic fittings. I assume they vibrated loose from road bumps. Never had a hot water tank leak afterwards.

Above might work for you as well....

I'm honestly not sure if either of these could be the issue. There is no water leaking on the control side of the heater. If it were there would not be any way for it to get back to the tank side and drip out from the styrofoam.....at least I think.......
The reason I'm fairly certain it is the aluminum tank is because the drip is on the backside coming out of the styrofoam around the lower water connection. Again it's definitely not the connection or the fitting area, it's down under the styrofoam.
So I'm thinking I may replace the tank.....the gas system fires and works, just put a new control board, t-stat and Eco sensor on it, I see no reason to spend double the money for a whole new water heater.....has anyone had success, assuming it's not an impossible pinhole leak, having the tank welded?

My leak was because the water heater runs so very hot and is not adjustable, the poppet pressure valve bleeds off pressure and water.

I turn the darn thing off once it heats up and it stays hot all day. I turn it on when we do dishes etcetera. It recovers so quickly we can shut it off again.

Try this: reestablish air pocket...

To replace the air start by turning off the water
heater system, shut off the incoming water supply
and open the closest hot water faucet. Pull the
handle on the pressure-temperature relief valve
straight out to allow the water to flow from the top
part of the tank. Once the water has stopped
flowing allow the handle on the valve to snap shut,
close the faucet and re-engage the water supply.