I crunched out on FreeCad today a file to cut out flanges to go from a vj11 to a t3 flange. This will be in the form of a dxf file. I'm not sure why this was never made before, but I will post it up if there is an interest after I have the first one cut. They will be 1/2" thick. There may be some obstacles with the bolts. You will need button 10.9 8mm x 1.25 or grind down some 12.9 zinc plated 8mm x1.25 socket cap screws x 1" (x4). I will leave the flange drilled but unthreaded, but most t3 flanges are 10 mm x 1.5. The inner will need to be ground to adjust to the t3 since I couldn't get it right on the program. The 8mm heads will recess up into the flange and you simply screw in 10mm studs that stick out from the other set of holes.