Here are some more pics of the wheel, this time in better quality and in front of a proper background. The photos are all quite large, so you can click on them for a more detailed view.
The complete wheel is about 1.7 m long and almost 2 m in height, thanks to the large wheel with 1.15 m diameter. It's mounted with the axis between my breast and shoulder height.
The extra wedges at the foot of the spindle holders is a concession to the transportability - they serve for adjusting the spindle holders and spindle. For a stationary wheel, I would adjust the holders once and then mount them to stay - but for transportable, this is of course not helpful.
There's only one wedge to keep the wheel stand in place - just like in the medieval depictions.