Yeah no worries Peewee. I was surprised at the way it turned out and I think it actually looks a bit neater than the plastic covers as it is all one single piece that keeps the dimensions/angles of the plastic cover over the spark plug leads at the front of the engine. I used metal with hex holes but you can get other patterns too, like squares circles etc. I think all the perforated holes help the hot air circulate from under the plenum a bit better than the old plastic covers too. Plus, no more missing sockets down that gaping hole into the valley of the V.
I think I still have the cardboard template around somewhere. If i find it I could PM you the dimensions, save you an hour or two under the bonnet chopping up cardboard. I guess you could turn it upside down if your plenum and throttle are in the original position, and you may have to do some minor chopping or changes based on your own setup but the basic layout would be the same I guess.