Interesting cyclone design where the dirt enters from the outside of the cylinder. I have just taken mine apart and sawed off the bases of each cyclone cone, enlarging them. Put it together again and pushed the vac round my bedroom. Seems to have sorted the problem, with the only ones retaining some fluff being those that I left with rough edges where the saw went through them. Will need to smooth off the tips of the cones now to stop fluff catching on the rough edges.
I like this little Turbopower, and it cleans very well, even without a turbo brush head supplied. I was surprised at how the standard head picks up cat hairs by suction alone on my carpets without the need for a turbo brush. I ran the Vax Mach Air over the carpet after using the TP cylinder and it didn't get up any more cat hairs. Previously I didn't think that non-turbo heads (combination floorheads) on cylinder cleaners were any good on carpet, but this one changes my mind. Its noisy and crude, but for £55 its OK now I have ironed out the flaw with the cyclones.