I'm planning on doing a cake involving stringwork. I'm thinking about doing it as follows:

Measuring circumference of round cake then marking points with a pin at evenly space intervals, and then piping the string.

does this sound right?

That sounds about right! Good luck!

Another thing I do is to make a tiny mark on the cake how far down I want the stringwork to be too - that way they all have the same "drop" to them.

at the risk of sounding like a complete idiot: what is stringwork?!

Here is a simple example of some I did on a Christmas cake:

http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=91766

(and asking questions is how we learn! )

Thank you, Loucinda, for the 'drop' tip! I had not thought of that.

here's some more simple string work I did earlier this year!
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1620586

oh my goodness. not for me!@! you guys are so talented, good for you.

Sweet T- GORGEOUS work, and by all means NOT simple! That is what I have always thought was Australian Stringwork, extension, or bridgework. What ever it is - you did an awesome job!