New Robofocus brackets

Just making a couple of new Aluminium brackets to hold the Robofocus units to the Sky 90s.  At present I mount the motors on a plate off the rack and pinion screws which on reflection is probably not the best way to do it.  It will almost certainly make no difference to the way the Sky 90s operate but it takes one more unknown out of the equation (I’m not sure with the present set up if I am applying too much pressure to the focuser rack and pinion).