Some of the pipes have threaded fittings on the ends for that reason, but I spent like 160 bucks at lowes that day without adding more to the list. Also they didn't sell any pre threaded pipes at my lowes, so I would have had to buy adapters for all the ends, plus use differant joints at the ends. Come to think of it I don't think they even had any corner (3way) adapters that had all sides threaded. I think the way I've got it set up, that the structure will be pretty secure. I have one more cross member that I"m going to add to the top middle in order to hang my light, and strengthen it further, but that will be simple to add.
I have been thinking about the adhesive for the last week, and trying to decide the best way to do it. I havn't decided exactly what the plan is just yet, I could easily staple the velrco through the plastic and mylar around the edges, in addition to the adhesive on the sheets. That should add further durability. I'm going to try to use a commercial grade spray adhesive, and I'll attach the velcro to the frame with a stronger type of glue then the spray, thats just for the main surface of the plastic/mylar sheets. I want to use the velcro so that all I have to do is detach the sheets, and roll them up if I need to take it all down.
I'm planning a passive intake, but I still also need an exhaust fan, or I may just get an air cooled hood, and not vent the room at all. That I think is what I would really like to do, either get a cool tube, or just a vented hood, and just vent the hot air. I have a couple fans for the inside of the tent to move air, and also 2 differant air filter systems I am going to try once they start getting some smell. I will prolly also get a couple jars of that ONA that King was talking about sounds like good stuff. I would like to get the cooled hood so that I can add CO2 in the near future aswell. That would allow me to run the co2 and not worry about it getting vented back out of the tent. Obviously I'll have to have some sort of vent out, but an air cooled hood would greatly decrease the amount of time which I needed to run that vent, maybe only 1-2 times a day. My basement stays at a pretty constant 62 degrees, now that its winter, I can drop that temp a bit with the small vent windows down there, but I think that with the size of the basement heat shouldn't be a problem. ONce I get the lights going, I'm sure that keeping the room around 75 should be easy enough.
I know I still have a bunch of stuff to work out, but I'm tryin. I appreciate the input, and suggestions guys thanks!