Hi

there were already some suggestions. So let me add my 2 ct's.

The first remark: the A-100 won't give you a guitar-synth. It will be a
very complex effect processor, but not a synth!

Now lets list the best effects you can do with an A-100 on a guitar
- Filtering: beginning with the luxury version of an auto-wah, up to the
simulation of other bodies with highly resonating filter banks.
- Delay based processing: from standard chorus/flanger to tuned
resonating delays.
- Classic Distortion: classic distortion is mostly done better with
classical guitar efx, but there are some auto-dynamic distortion things,
which cannot be done with the guitar stom boxes - e.g. Clean start of
the sound and the sustain fades over to a distortion.
- other types of distortion, like ringmodulation, stepped audio by
clocked s&h, Bit crushing, and others; all of these again dynamic
- Dynamic treatment: a modular system can be used as a very complex
dynamic processor (in sense of a compressor, sustainer, whatever...).
Typical ist frequency split band dynamics or time delayed dynamics.


The core of every patch will be the envelope follower A-119.
Additionally I suggest a slew limiter A-170 which can be used as a
second more flexible envelope follower. Also I recommend to add some in
and outputs to the A-119 (the modification is described in my book, but
I think I will put the infos to the files section.


for the listed functions I recommend the following modules:

Filters: A-121 or A-107 or A-101-1 - yes no moog or what ever filter!
You will need a multimode filter with highpasss, bandpass lowpass.
Soundwise I'd prefer the vactrol based 101-1, but the curtis chip based
121 and 107 are nice too.
Triple vc resonance filter A-127 or Trautoniumfilter A-104 (the 104 can
be changed only by truning the knowbs, while the A-127 is voltage
controlled, which means you can use it with a sweller pedal).

Delay: A-182-1 with 256 or 512 stages.

Classic distortion:
A-136. This one is the recommended for guitar (for synths the A-137
would be better).

Dynamic processing and all time/envelope based changes:
At least two linear VCAs with offset (required for compressor, ducker,
sustainer,...) either A-130 or A-132-3. Also for swell pedal control.
A-175 Dual voltage inverter.
A-138-D FX-Insert (and manual crossfader).
A-134-2 VC crossfader (crossfader for swell pedal control).
A-140 classic ADSR Envelope
any LFO out of A-143-3, A-144, A-145, A-146; where the quad LFO has more
LFOs but less functions.
A-148 S&H (can be used for stepped audio too)
A-138a linear Mixer for CVs but works also for audio.


other types of distortion
A-114 Ringmodulator
A-126 Frequency shifter
A-167 Analog Comparator (can be used as crude distortion with pulsewidth
modulation).
Instead of the A-114 and A-126 you might have a look for an Alesis
Bitrman, is also great for this kind of effects.



So my basic setup would be:

A-119 Input
A-138a Mixer
A-101-1 Filter
A-182-1 Delay
A-136 Distortion
A-132-3 VCA
A-138-D Efx-Insert
A-175 Voltage inverter
A-140 Envelope
A-144 LFO


If you still have money then add:
A-170 Slewlimiter
A-127 resonant filter
A-148 S&H
A-34-2 VC-crossfader
A-114 Ringmodulator
A-126 Frequency shifter
A-167 Comparator


Best regards, Florian