SpudFiles

Sorry: I don't know if the pictures are any good; this is the first time I've tried to post any.

This is the sprinkler valve we will be modding.
http://www.zshare.net/download/22376447a377bf/

This is the steel rod, remove it by heating a paper clip until it's red hot and then using it to melt away the plastic that holds the rod. http://www.zshare.net/download/2237754e814a3c/

This is the valve once the rod has been removed.
http://www.zshare.net/download/2237810a068f3a/

Now that the steel rod has been removed drill a hole were the rod was so you can tap the hole for your vent fittings.

he bottom rod is a piece of paper clip and the vertical steel rod is the main sprinkler rod.you can see the copper fitting that i tap http://www.zshare.net/download/2237893830b324/
http://www.zshare.net/download/2237906c347805/

this is the finish setup all epoxy together now put the sprinkler together without worrying about how to attach your blowgun with the steel rod getting in the way.
http://www.zshare.net/download/2237949fe7f721/

Your photos are huge.
Be kind to those of us who don't have broadband and edit them so that they are under (say) 50 kb.

While you are at it, it wouldn't hurt to have spudfiles host them, and it'd certainly make it more streamlined.