On Sunday, July 15, 2018 at 5:34:44 PM UTC-7, wrote:
My Ventus 2cxM has been flying in the Experimental Category since new (2003), and each year I've been faithfully updating the Experimental Letter (I just change the date) and mailing it to my FSDO. I've been told that the wording of the standard Experimental Letter is different now, and if I request it, I could have a Letter with the new wording issued. Does anyone have any comments about this?

I think the correct name for the letter is 'Program Letter' (not experimental letter).