My home inspection of Speedmaster heads

12many said

The plug type used are the same for the SM’s and the TF’s. I don’t have a pic of a plug installed in the SM’s but here’s what I’m talking about. Radiused, no sharp edges and the plug electrode more exposed. Install a plug and see how the electrode is recessed and the amount of sharp threads are exposed.

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With the images that "12many" provided of his TF's and all the conjecture regarding how to approach the plug holes is there any reason NOT TO just replicate how the TF's are done in this area. I'm admittedly no Pro Porter but am quite adept with hand tools and do like the way the TF's look in the plug area as i'm no fan of sharp edges and the plug has certainly become unshrouded. If someone can make a good case for NOT replicating the TF's i'm all ear's but if not it truly looks like the way to go.