I will at some point.
Had the needed equipment on my wishlist for christmas, but Santa had different plans for me
I bought a barbell + weights in January, so I haven't got any money for now and the things can get expensive, because you have to import them from the US. To get it to Germany I have to pay 150+€ just for shipping and taxes...(excluding the costs for the actual tools).
Must be around the same for you in the Netherlands.
You can get similar things from other manufacturers in Europe or go with DIY stuff, but I figured if I want to properly certify I better train with the equipment you have to use.
So for now I just follow the beginner routine from GripBoard with some added gripper and fat gripz work.
GripBoard is also probably the best source if you want info on how to train for the CTD.