Rhodes Chroma Polaris

hello all . 
im about to take the plunge and attempt to rebuild the front panel . replacing all buttons 
to get my polaris back in service . 
i have very basic soldering skills and even more basic knowledge of electronics (that 
makes it sound like a bad idea;)
anyway, i have downloaded the "chroma polaris panel button wiring matrix" PDF but have 
a few questions .
to anyone thta has rebuilt their front panel :
-what do the "SW" and "STB" signify on the PDF ? are these different types of switches ?
-what kind of electronic parts / switches to i need ? are they on/off or merely a 
momentary style switch (not sure of the correct terminology here) .
-what kind of size or depth switch would anyone recommend ?
-im assuming "J9A" , "J9B" , "J8A" and "J8B" are the connections on the PCB where the nasty 
fragile ribbon connectors would originally connect . which is which ? is this marked on the 
circuit board ? and are the connections counted from left to right / top to bottom or how ?

i guess it is then a matter of building a rats nest of wiring to connect the switches to each 
connection on the PCB . 
would i have to connect the switches "the correct way round" or do they connect either way 
round ?

apologies for so many questions, and if they seem very basic . i would like to check 
everything over thoroughly before i attempt this repair . 
to anyone who has completed a successful polaris facelift that could guide me through i 
would really appreciate the help . 

many many thanks in advance .