Converting a 9v train to work on 12v track

Hi all,
Question posed recently was:

Well, the 9v motor won't be compatible, unless you solder 4 pick ups on the
motor. This link may help: http://www.fgltc.org/bwoabs/9v_12v/9v_12v.phtml
It should show you how to convert a 9v motor into a 12volt one (after some
tweaking)

Just wonder if anyone has tried this & may have photos of such a project?

Thanks, Neil