chassis and BL upgrade

[mt_enthusiast]

I've got a stock E-Maxx chassis with the HV-Maxx (well, on it's way to Novak for replacement :() currently. I am also using the Strobe slipper and sprong with 14 cells (2 sets are side-by-side packs while 1 set is a 7cell stick pack). MIP CVDs all around.

So many questions, so little time. Here goes:
1) 14 cells = 9L. If I decide to try 16 cells at some point, will the 9L work fine or would the 10L be recommended?

2) CF or Aluminum G2 Chassis -- since I only bash, is there a better suited material? Also, I saw that some recommend the motor mount, but it isn't required. Besides looking cleaner, is there an advantage to the single motor mount? I also saw that others use the other motor mount to hold an ESC bracket.

3) I've been waiting for the Warrier 9920 to be restocked. I suppose the delay is Customs. I've looked at the MGM160, and I am wondering if I should give it a try instead of waiting for the 9920. What is the customer service, dependability, etc between the two? I'm still partial to the 9920 because of all the happy 9918/20 folks.

4) Is an on/off switch recommended and/or included like the HV-Maxx?

5) Strobe/9L gearing -- I am currently using the 51 tooth OFNA mod1 spur. I saw another thread which mentioned I wouldn't have to run 51T. Running 51/14 with UE Spyder 6 diffs on the HV-Maxx, I can only run in first gear based on Novak's recommendations. Would you recommend only running in 1st or 2nd with the 9L?

6) The G2 extension was also recommended in another thread when upgrading the chassis. Can I just buy a new CVD bone for the rear center to make up the difference.

Thanks!