The datawheel and 16 Knobs are caps, which should plugged on the 17 rotary encoders.

The LTC-Modul is optional and for MIDI IN, 2xMIDI OUT and MIDI THRU Commands or MIDI-TO-COM Mode It's not necessary for a complete SEQ-Box.

With a special circuit, it should be able to use the 9V PSU from C64.

For SEQ the maximum use are 2x 24LC256 or 1x 24LC512. The couple circuit should be built up like description under the menu-point “Bankstick”. Details under http://www.ucapps.de/midibox_seq_options.html

There is a description how to connect the 2 LCDs: http://www.ucapps.de/mbhp_lcd.html