I was told 8 feet for the bottom bracket is ideal, but there is a little leeway, just you may go over 10 feet at full extension.
As far as I understand, the arms will not extend below parallel with the ground, so they will always be angled upwards some. Also, I think the lower arms are about 6” above the bottom of the bracket. So if you install at 102”, I’m thinking the lowest rim height you could probably get would be about 9 feet.
The warranty dept. may be able to provide more info. They can be reached @ phone # 1(800) 558-5234.