Howdy from another new guy that bought the Mini. I'm generally pretty handy and pick things up quickly, but I never done anything like this. I assembled the boxes last weekend (a 1st for me) and built the crossovers last night (another 1st for me, but I've soldered things a few times). Here's a few photos of my progress. I'm planning on doing a veneer, which is yet another thing I've never done before.
Boxes assembled and sanded down the edges
1st crossover assembled and soldered
Both crossovers fully wired up and ready to go
Test fitting all the components with the crossover sitting in the bottom.
This is actually a pretty tight fit with the mid bass drivers. I did go ahead and connect the wires and tested the speaker for a little while to make sure I didn't screw up the crossover. I only did one channel and left the KEF Q350 for the other channel. I adjusted the balance a bit to even out the volume between the different speakers. It's hard to get a real impression this way, but it was at least keeping up with the KEF (which has a much larger set of drivers) and seemed to add more clarity. Again, just a quick check vs critical listening.