In response to Mark's assertion that a high drag configuration will cause the fuel to flow further to the front of the tank, this is true only to the extent that the attitude of the plane changes.
True, the fuel will slosh to the front of the tank momentarily due to the initiation of the draggy configuration, but then it will achieve stasis, and level off.
With the tank low on fuel, the fuel pickup in the rear only of the right tank will allow the tank to unport, causing fuel exhaustion. The header tank will allow the engine to run for a bit (which is why these things came with header tanks), but if sustained, it'll cough.
The Atlee 30 gallon tanks are nerve-wracking, in my experience, since they are so much bigger, and harder to determine how much gas you actually have left.
As to adding a fuel pickup to the front of the right tank, this would fix the descent unporting problem, but not the climb issue.
As has been noted several times here, none of this makes any difference if you have lots of gas on board. Problem comes when you are used to flying around with bunches of gas, then get in a situation where you are a little thin on gas.
In that instance, try to make sure that the left tank has the most fuel in it.
And, the two operative concepts above all are as noted above:
Know your airplane and its systems
and
Don't do anything stupid close to the ground, including running low on gas.
Just remember, during at least two points in every flight, you will be close to the ground. One of those points is usually where you have the least fuel on board.
Mike V