Hi,
Here is the data for 207 as of May 2011.
http://www.westsystem.com/ss/assets/Product-Data-PDFs/105207-Technical-Data.pdf
The 105 resin has yellow tint to it and must be mixed with the 207.
G5 is clear on both Resin and Hardener. If you recoat G5 within 5 minutes you get a very clear monolithic coat without yellowing and you don't have to sand until all coats are applied.
I apply 4 coats to my cues which builds up .012 and then I sand down about half to get a flat substrate and I don't worry about burning through.
I usually wait 12 to 24 hours before sand depending on humidity. To get a great job your cue, room, and G5 must be over 70 degrees. I usually have the cue and room and 75 to 80 degrees and microwave the G5 to 85 degrees. That seems to be the ideal. If you go too hot on he G5 is sets up too fast.
JMO of coarse,
Rick