Thanks for the information!
I do plan on buying a QSX, so will have first hand experiences with the uBitx v4, v5 AND the QSX when available. Really looking forward to when you have the QSX finished and we are able to order the kit. I am monitoring the QRPLabs Group.io reflector as well as this one.
Again, waiting anxiously for the QSX. Seems like it will be a really fun kit.