Grob 102CS tow-out gear

Hi, all, long time listener, first time poster.

I'm planning on flying in the Region 10 contest in August in my club's
mighty Grob 102CS. I know this will strike fear into the hearts of
all the other competitors.

Unfortunately, we lack any tow-out gear.

I'm in the process of building a wing wheel, and I have an idea on how
to build a tow bar, but before I go with my idea I thought I'd see if
anyone has any pics/drawings/ideas on how to build one.

Anyone care to post a known-good solution?

--Stefan