I know you're looking for others with T-100 experience with the mod, but thought I would toss this in anyway from my 2000 4Runner V-6 experience.

On mine, removing the elbow, got the same performance improvement as the deckplate mod.

I ran with the elbow removed for several years before I decided to do the deckplate mod..

The deckplate mod ends up causing more intake noise than just the elbow removed .. some people may like this, but after a while it got tiresome.. I ended up putting in this line of sight baffle which I could adjust the distance from the opening to mute the sound a bit.., but not reduce the air flow.. the round disc is an old 6" rubber sanding pad used with portable drills, that I had laying around.. <img src="/forums/images/graemlins/shiner.gif" alt="" /> <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

pic with air filter removed for better photo shot of mod...
[Linked Image]

And of course with the deck plate mod, it's easy to put the cap on, if running in water... and allows quick easy comparison runs with the cap on and cap off.. Believe me, it's worth doing the mod (or elbow removal) for the difference in power levels.

Hope this is of some help (and relevance to your 3.4L T100)