A handle for controlling water temperature andor water flow is mounted on the side of a bathtub and shaped such that the handle may be controlled by a bather’s foot. The adjustable compressor applies force to one or both ends of the beam and limits compression on the beam to allow the beam to move between a first buckled state and a second buckled state. for about 2\u02dc7 hours to form a maleimide modified epoxy resin.