S&W Revolver - LPA Rear Sight EIC Legal?

I'm setting up a revolver for EIC matches and just read the rules and am left a little unsure about something. I want to install the fine LPA adjustable rear sight, but Rule 4.1.3 a says "no external modification" which sounds like the LPA is a no-go. But Rule 4.1.3 e on sights says "adjustable open sights" are permitted. I guess I'm unsure how strictly the "no external modification" is meant.

"They must be factory manufactured with no external or internal modification made to the revolver as manufactured and sold by the factory of origin, except as authorized in this rule. No parts may be removed from the revolver, either externally or internally, nor may any part be added or modified, except for internal modifications to improve trigger functioning and accuracy and milling the cylinder to accommodate moon clips."

I would take the above wording to mean that if it isn't installed/originally sold as such by the factory, then it is a no go. I will say that the language in section "e" about sights is a bit confusing as it could lead one to think that sight modifications were allowed. Speaking as an editor, or someone who writes for a living, if I were writing these rules, I would clean those two sentences up.

"Sights may be fixed or adjustable open sights; optical sights are not permitted. Colored sights are permitted; the use of fiber optic or light enhancing or tritium inserts in sights is permitted."

No. Factory irons only

I assume this means that my 6” Colt Python cannot be used with a Wilson Combat rear sight?
Since the factory rear is basically useless for repeatability, I swapped in the Wilson, which is in effect an Elliason adjustable rear sight.
If so, no great loss. The K-14 has better factory sights from 60 years ago

NRA Dist rev is very specific.
Although it’s probably ok for NRA PPC Dist revolver!

Didn't the Python come with Elliason sights?
DP

Most came with Accro.  The Accro has the lead inside the sight frame, the Elliason had the leaf at the very rear.  The Elliason sighted ones usually came with a partridge front rather than the ramp.

This is a new stainless model, with the Rube Goldberg rear sight, held together with one .05” hex head plug screw. Adjusting it is a hit or miss proposition. Wilson fixes the problem.