fear not...i hang my fan, reflector and a 6"x24" carbon filter all hanging from my rafters with no sagging from the frame...when the DRs first started hitting the scene i watched a DR sales man hang from the rafters for a good 5 minutes with no damage (he had to weigh at least 165-175 lbs.
I have a DR300w. 4.9' x 9.9' x 6.7'
I weigh about 200 pounds.
I wanted to see if I could hang my Can-filter 33 on the side of the tent. I picked the most sturdy point right in the middle of the tent where 3 poles meet. I thought that the plastic used for this spot was weak and I needed to prove it.
I started to pull down on both sides of the plastic piece while holding on to each ceiling side bar. I applied only a small amount of pressure....equal to about 30 pounds, and one side of the plastic piece snapped off right in my hand.
I laughed cause I knew it all along. I did a review on my tent months ago and I spit up my coffee when I saw that peach gave the tent a 9/10 rating.
I will admit that the smaller tents like the DR120 and smaller have a better build because they use shorter bars. The tents that are 5' wide and larger use 2 bars for their crossmembers to connect to each plastic "holder".
I believe this is the main reason Secret Jardin either:
#1 - collaborated with Everest Garden Supply and Homebox to make the new tents
#2 - were bought out by Everest who used their technology
#3 - will stop making the Dark Room all together
Read my review of the DR300w and DR120 it may help.
You can see for yourself that the Grow Labs are the replacements the Dark Rooms. Stop buying the DRs. Waste of $$$ right now.