"D1@main body" = "barrel radius" + "wall thickness" + "Puck Diameter" / 2

"D1@center hole" = "barrel radius" - "wall thickness" - "Puck Diameter" / 2

"Puck Diameter"= 2.125in

"Puck height"= .785in

"wall thickness"= 1 / 16in

"barrels"= 12

"D2@tube sketch"="Puck Diameter"

"barrel radius"= ( "Puck Diameter" / 2 + "wall thickness" ) / ( sin ( 360 / 2 / "barrels" ) )

"D1@tube sketch"="barrel radius"

"D1@tubes"="barrels"

"D1@exit"="Puck height"+.05

"D1@CirPattern3"="barrels"