Braking markers - what do you use?

[rallycross]

What things do other people use for braking points when practicing?

I was at Cadwell this week and I was trying to use various different types of marker for my braking points but was struggling with picking things out (things like change of surface on circuit, barrier point, and brake boards.

What do you use for braking point markers?

[rallycross]

woof said:

There's 2 methods - use a point on the track or some people just do it visually as a distance from the corner. If that makes sense. Ie they don't use a track marker, they spot the distance as they look at the corner.

This is why I asked the question, I have always been doing it visually (using the 'force' to judge it just right) but now I am trying to use markers to be more scientific, and hopefully quicker. It feels easier using sight rather than picking the right marker point.