C-010 Dual lag/slew limiter (4HP) -> C-011 Precision dual lag/slew limiter (4HP) or C-012 Precision dual up/down lag – slew limiter (4HP)
C-040 Dual AD/AR envelope generator (4HP) -> C-041 Dual AD/AR envelope generator (4HP)
C-510 Synare 1 – envelope generators + VCA (4HP) -> C-035 ENV+VCA (4HP)
L-110 LFO (4HP) -> L-111 LFO2 (4HP)
M-215 Trig/gate to MIDI (8HP) -> M-217 Trig/gate to MIDI w. velocity (8HP)
M-216 Trig/gate to MIDI (8HP) -> M-217 Trig/gate to MIDI w. velocity (8HP)
R-330 Reverb (4HP) – no follower
U-010 CV shifter/amplifier (4HP) -> U-011 CV amplifier/shifter (4HP) -> U-012 Dual Attenuverter+DC (4HP)
Drum synths (Synare, Super Space Drum, Coron DS8…)