Rear Engine Firewall - access door

[YankeeClipper]

This topic was addressed as a tangent in Tom's thread about losing the rear engine. Don't want to redirect that thread any further, lest he squawk 7500 on me, but I couldn't find any other threads on this mod.

So I wanted to solicit any direct or indirect feedback on the rear engine panel mod. I wondered if it was susceptible to cold air, fumes, or noise, for example. Or if it was just plain worth it in general.