2nd having a good look at Troels Gravesens site… lots of experience there. Check out also builders projects completed. Lots of great ScanSpeak and Seas projects. I’m seriously considering the loudspeaker 2. I would say these are moderately hard woodworking projects, especially if you are planning veneer finishes.
ps You need to be very sure you are keeping these for life… it’s pretty tough to get your money back fro a diy project.