I'm experimenting with toner transfer right now to get a decent pcb done for this project. Seems I'll be needing a laminator - or much more practice and pressure. My tiny iron just doesn't do a good job for more than 25x25mm. So far I've tested this with "HP Premium Plus Photo Paper, satin matte" (for inkjets, but printed with a laser of course). Except for some defects at the edges it delivers a remarkably sticky layer on the copper with sharp edges. Not worse than most of the photo transfer I've done so far, and less chemicals :-)
I'll post some pictures and videos of the current status when I wake up again. Right now there's also code for individually addressing each of the 64 rgb leds, set a HUE value, set RGB values and some fader effects for testing. Right now the PWMing is done with an ISR routine and supports 28 brightness levels for each colour channel. Anything above that takes longer than timer2 can support. I'll switch to timer1 to get more time in the ISR routine.