After I received the new Power Pack B from Flite Test I went to install the motor on the firewall. I was looking for the 2.5 mm socket head cap screws that I am accustomed to. Looks like they have been replaced with 2mm button head screws. No big deal you say. Here is the problem. The 2.5 mm ball driver that I use has a much larger handle than the 2 mm. So it’s easy to put a lot of force on the screws to make the motor / firewall connections nice and tight. The 2 mm ball driver has a much smaller handle, so it makes it hard to use a lot of force. One option is to use the X mount that comes with the motors. Next motor that I mount will be held on with the X mount, socket head cap screws, and blind nuts on the back side of the firewall.