Actually one of these thin profile bike wench will fit in the coil grove perfectly also (I forgot what size though):
http://www.rei.com/product/639276/pa...e-wrench-dcw-2
But you have to be careful when applying the force on the wrench when lifting the coil out or you risk breaking that lip on the coil. That's why I decided to make that pvc tool. For $30, I would say the one TxStig is making is well worth it if you plan to keep the car for a while and will do multiple plug change.
