Its going to be a modified Harris pole, the basic Harris pole is ideal as it is in my opinion!! And I think that most people on here now agree that it is a fantastic value for money pole!!!
I'm still waiting for an slx/facelift user to post a vid to show why their pole is worth £400+ more than the Harris!! But as yet no one has taken up the challenge!! The only justification they seem to be able to give for the extra cost is that the slx is shorter when closed down, and less whippy! Thats why I'm going to make one that extends as far as the slx and retracts to 5ft 7", the same as an slx!!! The shorter lengths will possibly make it stiffer as well, although I have no problem with a little bit of whip as it helps me to clean windows much faster than if the pole was more rigid!!! 
Just a point, a more flexible pole will always take more energy to brush a window clean than a rigid pole. The speed may be the same but the energy expended to achieve the same effect will be a lot greater.
Whilst the flexibility of a Harris pole is OK at 15ft (which from your videos, it is), if you extrapolated this to a 25ft pole it would become almost unusable.
I am sure the Harris pole is proving to be a very useful tool but there really is a world of difference between these type of poles and a purpose built carbon fibre pole (apart from the cost

). Admittedly I would not bother buying a 15ft carbon fibre pole as it would be overkill. However the option of a carbon fibre pole at 25ft which can then also be used on ground level work is a pole that many people do want, myself included. It all depends on whether a 15ft pole will reach all of your work, which for many domestic window cleaners it will.