OEM updates, OEM updates and preservation Options

[Jasfsmith]

Reviewing the current PCA PCR's leads me to ask this question.

What replacement items are considered valid OEM replacement items. For example the weatherstripping along the top of the windows mounted to the Targa top. The original design has been superceded with a newer design (by the factory).

Would the replacement of the earlier with the later design be considered acceptable in a Preservation Class or would you receive demerits? Taking that one step further, if a reproduction seal was utilized, what would be the assessment.

As I am reading the PCA PCR's the Preservation Class judging places first importance on originality and then condition.

If replacement of serviceable items is permited, what items would that include.