well, it would be clear to you if you would have read higher posts
... but it's all about the stickpack-mod.
The stickpack comes at the right side of the car,thus the need to reposition the receiver and servo on the left side.
There they are positioned more to the front of the car, where the bodyshell is lower. ... and thus the servohorn just slightly touches the bodyshell.
I would have gone for this solution myself.
A laydown servo can easely be mounted with the standard servo-mounts, just by drilling two new holes through the chassis. The ESC then can be mounted on top of the servo.
Also, as the reciver is now also in the front , there actually is an antenna-mount-position allready in the front of the car which was not used with the saddlepack-battery. Must have been an heritage from the old-style-preds.
But since I have a low-profile servo, there isn't much room on that servo to mount the ESC. So and receiver are velcro-taped on to the chassis. The standing up servo actually gives the easiest fitting fo all components.