Is there a chart of sorts that lays out the different battery trays sizes and what batts are compatible? I am about to buy a new truggy to convert and was really set o teh RC8T until I read the battery tray doesn't fit a lot of batts. I want to run 4s with the most available mah that will fit, 6000 or hopefully more for long runs. I am told the AE conversion tray doesn't fit most if any SMC batts and is limited to what it will hold. What are my options? Thanks