I have not. I get by on 38, generally there is plenty of diesel around. I only take the extra 15 minutes to fill to the brim when diesel is really cheap and I'm going into a higher priced area or I'm hitting some backcountry and don't want the extra. Oh, and every once in a while I find the perfect pump that just trickles it in and doesn't click off every 15 seconds.
The main problem with this is that it is really hard to stop before dumping diesel all over the van, since you have to go slow enough to avoid the auto cut off, it doesn't cut off at all.
But don't get me started about my list of "intended" projects... compiling a list of intended projects is a project I'm putting off...