He told that he used SD1000 here : https://www.varranger.com/vforum/index.php/topic,68.msg26105.html#msg26105

My vArranger keyboard will be 100% virtual instruments.

I am very happy with it.

I have included a very powerfull small computer with a i7 fast SSD and 32 GB of RAM
https://www.amazon.com/Intel-NUC-Kit-NUC6i7KYK-Mini/dp/B01DJ9XS52

I have a very good FATAR keybed like korg PA4X, and have created some electronics to convert it to MIDI/USB

I am very happy about the velocity sensitive curve I have created, as I never found a keyboard with a good velocity curve and even the aftertouch...

I will show you some pictures soon... I have to find a way to create a wood / metal case for this keyboard so i can carry it on stage.

I can't wait for my next gig with using so good VST sounds

In the opposite, I have tested KEYSCAPE VST and did not like it

I stay with my Sonivox Eighty Eight piano sound