Leaving the build threads to the pros, I was thinking about how annoying is to be installing servos and measuring on new installations, and because I need to install 6 3421 on my Xurama I thought about making a dummy.
I took five minutes to make, two little pieces of 3/16 and one 1/16,CA toguether, outlined the servo on the wood with grommets and everything for correct height and cut it with the old faithfull Dremel saw, so no worries about the damm wire being squeezed in and out six time.
Maybe it does exist already or there's a better idea, but this one worked good for me and it was free

, if it is of use to anybody then great!
Regards