where could it be located? i must be blind cuz i dont see a screw

why>?

2 flat sections at the base of the flash hinder..grub screw should be located in one of them. good luck tryin to find a hex/allen key small enough to loosen it..I had to use a pair of pointed end tweesers to get mine out..Re-wired my 249 and dropped a 9.6 3300mah large type batt in ..She whines really good now.

I think I'm gonna add a mosfet connection as well..should get a bit more speed out of her