RCbuddah - i'll answer those questions for you
Your charging procedure sounds good. I would peak at 6 amps for stock and 5 for mod to get more runtime. 6 amps will still give you enough runtime and higher voltage
Its not necessary to charge/discharge the night before your race. Keeping them at 5.4 v discharge for the week is fine.
If you want, you can tray the cells down but not really necessary for these newer cells. You're repeaking values before a race sounds good, it's what I do on my GFX. All your trays will do a good job. I use a realtime 2 tray on my cells till the bulbs dim.
The statement from the website is for after you have already raced/cycled the packs down once during the day. This next charge is after it has cooled for an hour and a half. Repeak at .05 delta V and it will lead to be higher voltage from the pack.
Hope this helps, please ask if you have any other questions.