I make a habit of always putting a 3/8th inch drain hole in the tank compartment whenever possible.
I drill the hole, then coat with a few layers of fuel proofing. That way the sides of the hole are protected from the leaking fuel and the hole decreases in diameter slightly but still leaves more than enough room for drainage.
Trust me, you'd rather see the leak and stop fueling vs. toasting your receiver with glow fuel or gas!!!

Jeff