Strange, that this guitar has not attracted more attention so far. I can confirm that Achim Gropius builds great cedar guitars with Honduran rosewoos b & s. Mine, built in 2007, is full bodied instrument with boomy basses, but with good balance as well and a transparent tonal character, just as the one Dofpic described above. I have sold mine as well, but only to co-finance a new spruce guitar built by Fritz Ober.
The secret of getting ahead is getting started (Mark Twain)
Tobias Braun, Santos copy, spruce/yew, 2017
Andrea Tacchi, Enrique Garcia model, Spruce/BRAZ, 2016
Giovanni Tacchi, Daniel Friederich copy, cedar/EIR, 2017
Alain Raifort, cedar/EIR, 2004