hey amigo. I have tested the epoxy glue on another design at speeds of over 4000 rpm (estimate) with neos. That was scary...lol. This rotor doesnt go very fast in comparison and the magnets are recessed in and glued on three sides. Your probably right however, and a neat bit of tape will probably improve it aesthetically too. Safety first!

Jet, I got the rotor cnc/laser cut so as to ensure neat and centered finish. I rang around and was quoted as high as $400 aud for a 300mm by 20mm rotor, ended up finding a place just up the road that did it for $77.00 I grinded/filed out the recesses for the magnets by hand, its pretty easy stuff to shape if your patient. The coil mount plate and back plate is just some acrylic window material I got from a local hardware store, bout $40 for a huge sheet. Cuts with jigsaw, although its thinner and easier to crack if you rush it.

Looking at getting some new sla's over the next few weeks for serious tests!