Just one more thing to remember - as well as the concrete/grass junction, some of those runway markings can be pretty rough on the smallest wheel. It's not uncommon for numbers or centrelines to be made of whitewashed concrete set well below the level of the grass surface.
To avoid the risk of a propstrike or snagging a tyre it pays to plan your manoeuvre so as to avoid the blighters altogether eg line-up or taxi to one side, cross between the markers etc.
Having said which - go enjoy!
HnH