Love the draesser cab man, My buddy did the same thing and kept getting a heat problem and eventually just always had to prop the door open, pretty much defeating the purpose I guess?..Im diggin the incognitto grow though!
A friend of my mind just flew down from portland to san francisco with 8 grams and I asked him the same question and he said it was just a s potent as before he flew.
My buddy just got one and we have been using it every day with the solid valve, and its amazing! I do feel like it does use a little bit more stuff though,But its well worth it.
They are extremly quiet, I have a 400w hps in my closet and my little 6in fan is way louder, doors open or closed. I would imagin a 150w to be even quited just because less current would be flowing.
hope this helps!