Here is the main riff to the Saxaboom solo that jack plays. I put it in a few different tunings for you
4-string Standard tuning
G|------7------5--5-5-|
D|---------------7-7--|
A|---5-----8-8--------|
E|--------------------|
4-string drop D tuning (octave lower)
G|--------------------|
D|--------------------|
A|------0------3-0303-|
D|---0-----3-3--------|
4-string drop C tuning
[ Tab from: https://www.guitartabs.cc/tabs/t/tenacious_d/saxaboom_btab.html ]
F|-----9---0-0-7-4747-|
C|--------------------|
G|---7----------------|
C|--------------------|
5-string Standard tuning (octave lower)
G|--------------------|
D|--------------------|
A|-----0-------3-0303-|
E|---------1-1--------|
B|---3----------------|
4-string drop C tuning (octave lower)
E|--------------------|
G|------2------0-2020-|
D|--------------------|
A|---2-----5-5--------|
6-string Standard tuning
C|------2------0--0-0-|
G|---------------2-2--|
D|---0-----3-3--------|
A|--------------------|
E|--------------------|