My first mod was to dump the phillips head motor mount screws. I replaced them with 3mm x 6 socket head cap screws . At least that's how Dubro labels them. I call them good old allen head screws. I also added number 4 washers. I have a 2.5mm ball end allen driver that allows you access the heads at an angle. Pretty handy for getting to the screws with the battery tray in the way.
I got the Park adapter and had planned on installing. Now I can't remember why I was so hot to do that. I've already cut the frame so the Esky 3800 fits. Anyway, I looked at the adapter at it appears that you supposed to attach it to the motor, then attach the assembly to the motor mount, 4 screws total. I didn't like that idea, so I had intended on drilling the holes out so my current screws would fit. Then get a longer versions of the same screws to accomodate the additonal thickness of the adapter. I picked up another bag from Dubro, this time 3mm X 8. Its the same as the other one just a little longer. I haven't fitted it to the heli yet because I forgot why I wanted the park adapter. Regardless, I need the screws anyway for the Xtreme frame stiffener.