Cooltube without adjustable height?

Using a cooltube inside a stealth box, would it be better to fix it to the top of the box? and adjust the plant height to the light using a shelf?

or better to raise and lower the cooltube with chains?

I would think fix it solid to the top of the box being heat isn't going to be a big issue.

i would prefer the chains. that way u get it exactly where u want it....

Ya ok. I was hoping to get around needing so much exhaust duct work, but I can live with it. Plus I was toying with the idea of making an arc'd scrog net but ya it makes sense being able to get the light adjusted exactly as close as I can.