Mine also looks just like the setup pictured in SeaFever's post. Very useful with different sail geometries. In summer, we have brisk winds - 20-25kn - so I use a high-cut 90% blade. In winter (yes, California, so we sail all year!) I fly my big genoa, clew a lot lower. The track makes adjustment easy.
From memory, 4' sounds about right.
I also keep the pole on the stanchions. Less windage, easy to deploy. I had to make a small bracket aft (parts from Sailrite) so the pole did not rub against the chainplates. Seems to work well.