I have tried to send an email explaining what was done but its bouncing back. I will post the advice kindly sent in from Tim Jenkinson ( Thanks Tim)

The 8411’s do not fit without modification. You need to very carefully all but remove the balsa backing to the top wing skin to create an extra 1.5mm depth for the servo. Throw away the metal servo mounts supplied and use much smaller/thinner molded BVM ones which will need to be countersunk and then use countersunk screws to attach BVM brackets to mounting block. A normal dome head screw will not allow the servo cover plate to fit. Make sure the mounting blocks are glued to both the top and bottom skins, I reckon the thinned top skin would not be secure enough on its own.


Regards Al