http://www.troybuiltmodels.com for the wingtube
Can't recall now, but the Vision has a hardwood plate where the screw goes into the stab and into the stab tube... I drilled a pilot hole and used servo screws (socket head)... It tpas tight intot he hardwood mounting block and into the tube as well. bo need for internal blocks in the tube there anyway...
I use the Chip hyde horns on the rudder of the DV and get PLENTY throw... using them you get 2/56 bolts and bolt through the rudder and both horns and use nylock locking buts n the other side.