Finished my third blade today, using 2 x 144 led/m strips. The diffusion worked out good enough. (It would have worked out better if I could have used a transwhite tube, but the inner diffuser just didn't fit. For some reason the transwhite blade are slightly smaller, both inside and outside. Also, I didn't do a great job on the packing foam wrapping, so there are a few creases, which show up on the blade, but are not overly visible.
The blade is a little brighter than the PL9823 blade, but perhaps more importantly, it is also lighter than the string blades, making it easier to swing around. Now I just need to update the instructions. Also, I'm going to make a video to try to compare the brightness of the blades.