Here is schematic of Giesberts ( ELEKTOR ) amplifier. It could be simply substitute of GC. Good PCB project is only needed. Amp is very fast 100V/uS and sounds realy good. Power: 45 W/8R, 85W/4R.
Here is my proposition of Giesberts amp - now it is Best Amp original circuit sound wonderfull so this version is better and stronger and maybe it beat Krell KSA50 clone and Accuphase E407 clone which I've biuld 🙂