Nah. My Exceleron is exactly upside down and it runs just fine.
You can also use a hotter glow plug if you so desire.
Chris, I take it you managed to get to the field..

last time I was out, I had trouble getting to the field let alone on the field. It was pretty mucky.
I've got three electrics and one glow to maiden. Today would have been nice. Not a breath of wind. Jeech.. but had to take the Volvo to the dealership in Cherry Hill for service... found out I had a bad tire. Cost me $250 before I was out of there. Jeech.. always something. Went for an oil change and ended up... well, you get the picture.
Later.