Hello all. I'm making some parts out of 718 that come to me as .625" x 3.600" bar with a .350" hole gun drilled through the center. First op machines a tube port with an OD of .565", an ID of .450", and a depth of .360". Second op clamps on that port with a collet and uses the tailstock and a little plug in the gun drilled hole to fit the tailstock. Then turns the rest of the OD to .450". So it basically becomes a little tube with a port at one end. When I clamp on the port with my minimum 100# pressure it crushes it by about a thou. My boss said to make a fixture for it and clamp on that. I made two plugs out of 718 to fit in the ID at .450" x .300" with a couple tenths in between the part and the plug. And then turned a shoulder up to .625" to clamp on with my collet. Using tailstock pressure to clamp the part to the shoulder of the plug I showed my boss and he said no. Nixed all my work and had me make pins to fit in the port so when I clamp on it they don't let it crush. I told him they would just get stuck in the port. Even though we're going his way I was curious if my idea would work. If I pressed the part against the plug I'm clamping on with 100#-200# of tailstock pressure and tried to turn it with light passes would it spin on my fixture or would it work?