The tank had pinholes through out and the bottom of the tank was replaced. It held fuel for 2 months before delaminating. Further metal replacement was not possible after the TankRenu was applied.
I have had a reproduction tank for the last 5 years with no issues. The first gas tanks that came out were not a good fit. I am building another M38 and I am planning on putting in an other MD gas tank.
You can still end up with an earlier tank if your vendor has a lot of stock lying on the shelf. I would insist on a tank produced by MD Juan after Jan 2015.
The height of the M38 tank in mine barely clears the seat. I also had to do some tapping and tweaking to get the extendable spout to fit , otherwise it's fine. The M38A1 tank I bought was a total failure. Good luck. John