Rebis rack. Delay, modulator, mixer units .... info, circuit diagram request

[looebloke]

Hello. I had a rebis rack system in the 1980s. I loved the adt/flange/delay package - RA 205, RA 208, RA 209. I am a non techno savvy person looking for a way of recapturing those magic sounds. I wonder if there is a way of reproducing its functions with modern kit .... eg stringing together some analogue guitar pedals. And/or... does anyone have circuit diagrams I could show to one or two of my electronics savvy chums to see if they could build something similar? Thank you in advance.