A simple counting argument is used to show that for all q, an Andr\'e hyper-regulus X in PG(5,q) has exactly two switching sets. Moreover, there are exactly 2(q2+q+1) planes in PG(5,q) that meet every plane of X in a point, namely the planes in the switching sets.
@article{arxiv.1409.6795,
title = {Hyper-reguli in PG(5,q)},
author = {S. G. Barwick and Wen-Ai Jackson},
journal= {arXiv preprint arXiv:1409.6795},
year = {2014}
}