Good point on the difference between desert & Western European woods and how they could account for the lack of 'dark green' hexside symbols on the AIW maps.
On the AF for M unit types, I guess I wasn't entirely clear. There aren't a ton of identical versions of (H) and M units between PL and AIW, but there are a couple to derive data points from, and in almost every case I find it obvious what AF to reduce PL units to so as to make the AIW WEC useful as a replacement. My only real question lies with the small(er) mortars, like the 81mm for example. If you, like I, intended to convert the PL version to the lower AF levels so as to use the AIW tables for IF, would you leave the AF at 3, reduce it to 2, or follow the 1/3 trend and reduce it all the way to 1? This is, again, for playing PL but with the AIW-era tables, movement and IF rules. Using AIW boards is just a bonus, as I like being able to handle games set in north Afrika.
Not debating who did what during the real war, I simply have little or no interest in playing wargames covering that part of WWII. Everybody's got their preferences.