After watching Dean Collins 4-DVD box-set I was left feeling much more educated and inspired to start using diffusion panels myself - So I built a few. It's the same old basic design really. BOM: 8x 3metre lengths of 21.5mm PVC pipe. 16x Right-angled couplings. 2x 180cm x 180cm shower curtains. (I actually bought one white, one semi-translucent) I basically made one cut on each 3m length of PCV pipe. As the shower curtains are 180cm wide I cut the PVC pipes to 185cm (allowing for space and insertion into the right-angled pieces).. and that left 115cm length for the top and bottom lengths. I then laid out the shower curtain, laid the 185cm PVC length on top, glued the edge of the curtain onto the pipe - I then did the same at the other end of the curtain. This eliminates any cutting of the fabric and you just roll the fabric up onto the pipes - It's also very good for adjusting tension on the fabric, as you just twist the pipe once assembled to get desired tension. Next step was to assemble the panel. Once assembled i laid the whole thing down on a flat surface (the floor) to make sure the right angled pieces were flat, then I glued in the shorter PVC pipe ends into the right angled pieces - this keeps it from bending/flexing out of shape so much. *Don't glue the longer pipes with the fabric onto the right-angled pieces as you wont be able to adjust tension or disassemble!. (for good measure i taped over the glued joint, i also put a little tape over the longer PVC pipe to get a snugger fit. To attach two panels to make them freestanding I used 2 tie wraps, one top, one bottom, they work fine, no need for special clips. 2 panels (4 complete panels) assembled (2 separate freestanding "double panels"): The whole thing disassembles quickly and easily, the fabric rolls onto the two pipes its attached to like so: 1 panel (2 complete panels) disassembled: So that's that! I will need some black material to attach to the two "blank" supporting panels to use as a flag/negative fill - they'll be glued and attached like the shower curtains were so they can be rolled up in the same way.. I'm also going to get a silver reflective material which i'll be able to attach behind the diffusion panels by using velcro pads onto the shorter pipes - i'll have velcro on both sides of the silver material so i can use it either behind the diffusion curtains for a softer reflective fill or use them alone for a harder reflective fill. Oh yeah the shower curtains are great, no lines in the material etc.. I'll just need to lay them flat and iron the creases out.. i'm hoping they wont get creased when they're rolled up either!