[NTG-context] Table of contents setup

Hello, I am busy to typeset a book with Maguntia.ttf. I should prepare the TOC with leaders. However how can I get ConTeXT to use the same leader-size on all levels which need leaders? As in the given example the leaders are adapted to the size of the font. Secondly I would like to have the page numbers all in the same size, irrespective from the level. Thirdly, I would love to adapt the distance between the leader-dots to a bigger size. How to do that? Kind regards Willi