A few toggle design choices

[paramita]

Ok. So lets open the retro fit with tangs can of worms! A few questions (please feel free to answer any questions I'm not smart enough to ask)

1. what's the best method for attaching the tang?
   
   • Im imagining (hoping this isn't a terrible idea) that I could through bolt from one side of the mast to the other using the existing holes for the T-balls. My concern here is weather or not a bolt through the center of the mast would interfere with internal halyards or electrical wiring.
   • If a through bolt is the way to go could some one point me in the direction of what type of nut and bolt is recommended for this application.
2. do I need to have the tang fabricated to match the angle I measure for the current shroud? or are there standard aftermarket tangs I should look at?