You can also see the standard "second topside" above the two jets, opposite the main topside control.
We use the standard control systems with no "bastardized parts" like the large corporate spa compainies use.
All of our parts that function inside the spa are available anywhere.  The word "Exclusive" is a "dirty word" in
my opinion when it comes to parts.  Try fixing a 10 year old spa in which the parts are no longer available.