As Stephe is soon to build some speaker kits, I thought I would share my experience of doing the same. Back in 2001, I purchased five kit speakers from the Australian company VAF (www.vaf.com.au) for my home theatre. At the time, VAF offered their affordable DC range in kit form as well as fully assembled. They no longer do this. My brother recently gifted me a pair of DC-1 speakers that I use as Atmos front speakers.
Unlike the kit Stephe is looking forward to building, VAF sent fully assembled cabinets and crossovers with wiring attached. I think this was due to the complex nature of the speakers internal structure. For example, their largest DC-X speakers have a large internal brace that doubles as a transmission wave guide. The cabinets are made from painted 20mm MDF and use a full length stocking and vinyl covered caps to finish off the top and bottom of the speakers. It was more of a component assembly rather than a complete build.
The DC-X uses a minimal component crossover, just a single resistor and capacitor due to close driver matching and tuning. The smaller DC speakers have more complex crossovers. The DC-X and early DC-2 speakers have a D'appolito array and the tweeter on the DC-X is recessed into the cabinet for improved time alignment with the woofers.
The DC-Xs sound excellent for the money and are still in perfect condition after all these years (likely due to my cities dry climate). They produce a really nice soundstage and go down to the 30hz region. Their only fault is that they can be too revealing so you hear every little flaw in the recording process
You can read more about the DC-X Series 1 here (mine are Series 2 and the crossover resistor is the only difference as far as I am aware): https://archive.org/details/EA1997/EA%201997-01%20January/
VAF DC-X showing the D'appolito driver array and the use of felt pads to dampen driver resonances in the woofers and absorb sound diffraction from the tweeter:
The VAF DC-X Crossover. Note, I ordered the cable upgrade for these speakers:
The more complex crossover and standard wiring of the small VAF DC-1 speaker:
Those look great!!