My "problem" stemmed from the lack of a key being presented on the Sonitus gate window ("key" in this context refers to the track that is driving the side-chaining). I went and looked at Fabfilter G documentation, and they show how 3 different DAWs show the key, and each showed the key in a different way. What tripped me up is that Sonar doesn't show any key at all. You just have to know that in Sonar you simply need to create a send to whatever gate you are using that does sidechaining, and it magically works.
I think the beauty in using a sine wave to fatten the kick a bit, is that you can use a sine wave in the musical key you are working in
(ruh ro rorge, my table formatting blew up !!) :
Key
Hz
Hz2
C1
32.70
65.40
C#1/Db1
34.65
69.30
D1
36.71
73.42
D#1/Eb1
38.89
77.78
E1
41.20
82.40
F1
43.65
87.30
F#1/Gb1
46.25
92.50
G1
49.00
98.00
G#1/Ab1
51.91
103.82
A1
55.00
110.00
A#1/Bb1
58.27
116.54
B1
61.74
123.48