We had the pleasure of speaking to Random Source about their origins in the Serge world and how we got to the Euro Serge and module based 4U Serge we see today. All the designs are made under license and with new ideas and circuit tweaks/improvements over seen and agreed with by Serge himself. Great to get a bit of history about the company and check out Thonk.co.uk for DIY kits of the Serge modules.