Not really Dave when you take into account the falling head when the power goes off.
I looked at this machine, liked the use of linear rail, had reservations about the use of belt on the Z over a leadscrew. However, the counterbalance spring is a good solution. Heated bed, depends what you intend to print with. I wouldn't go too exotic due to the use of printed parts. Build a cabinet for it to cut down dust and draughts. In winter my PLA printers have the cabinets warmed to 20 ℃ with a hair drier, after that the printing process is enough to keep them around that temperature for consistent prints.
The Cetus is on my wish list, but only when they have a UK supplier. Look forward to Andrews mangling of it
The Cetus is made by Tiertime, the same company that do the UP printers and a range of professional FDM machines. They have a lot of experience with printers. Another option for the counterbalance would be a sash window style fix, counterweight and pulleys 3D printed of course.