connection support arm support arm adjusting balancer assy foot + rivet female hinge support support arm lead rail end plate connection lead rail inside lead rail outside lead rail fabric lead rail end plate connection lead rail hand crank L.H. spring arm support L.H. spring arm R.H. spring arm R.H. spring arm support roller tube gear assy + coupling funnel upper crank pin R.H. end plate R.H. end plate main housing L.H. end plate + gear L.H. & R.H. side cap Adapter set