The WX has interrupted my progress to finish my grounding. Doing the same as you to get the electrical and the Sat and Cable TV shields to be at same ground potential.
The lightning pulse must have come in through the cable TV ground and did its damage.
I may have to rebuild what I had from a previous QTH.
I still have these:http://www.chatsworth.com/products/grounding-and-bonding/insulators/
The red ones.
I secured a piece of copper pipe to those standoffs and silver soldered #6 stranded to all pieces of electronics in the shack. Separate runs. And #6 out to the house ground / electrical service entrance / Sat and Cable.
If you want to get anal, you can use an exothermic or CADWELD process for these wires. The same for the tower. One #6 stranded to each tower leg ( get Polyphaser connector or CADWELD directly to the tower) and then to the 2-3 ground rods around the tower. All bonded together and then bonded to the house grounding system. If something happens, your entire installation will rise and fall with the same potential from the nearby strike and nothing damaged.
Motorola Grounding R56 standards. We never had anymore lightning problems with our trunked radio sites after we had those standards installed.
I copied the best I could from what I saw and the Chatsworth insulators were the only things I bought. Of course, the #6 stranded and silver solder and those nice crimp connectors.
That SPG panel from Poly is very pricey. That's why I went with a length of copper pipe, etc etc.
I only use one of those Polyphaser rotor wire protector at the pole. All cabling for my rotor and RF are in a plastic pipe 5 feet down and come into the basement shack.