Standard servo gearbox for Ursa

I had made a modification to the gearbox for using a standard size servo. The distance between the screw holes on each side of the servo is wrong, you'll be able to use only 2 screws to hold the servo in place - but they are enough. Also, I include a steering link to use with this.
You'll have to use the very small frame 04, or the modification I also include - frame 03 with some rods cut off.
I know it is ugly, but it works. I wish tahustvedt would make the option for using a standard servo a