Hello
the picture is Marlene de Boer
Yes I raised them on the the fit we made (not much really) and I went for a 5 degree extension and the Vuka is in the "middle" like on the picture
you can easily lower or raise it, all the spacers are on the bike.
the transition is more natural for me.
But the final decision on the angle, will be made on the delivery.
The only thing , I found a bit tricky, the seat post, it is just sits into the frame on same dampers so you only have a very short range, max 40mm (officially 20mm) the fitter came with 3 different seat posts :).
I was amazed how comfortable it was..
you may have more infos here
https://www.ku-cycle.com/...july-2021-aero-test/