colors the power switch es 58 can have switch magnets the switch magnets can controllably activate a hall effect type magnetic switch on the board 80 fig7 illustrates that the surface texturing 48 can have rounded projection 70 such as knurls knobs beads or combinations thereof the projections 70 can abut other adjacent projections 70 on one two three or all sides all of the projections 70 not against the edge of the surface texturing 48 can abut other adjacent projections on all sides projection nadirs 72 can be between abutting projections 70 each projection 70 can each have a have a projection apex 74 each projection 70 can have a variably selected thickness compared with the other projections 70 all of the projection nadirs 72 can be at about the side thickness through the wall 30 a projection thickness 76 for each projection 70 can be the thickness from the projection nadir 72 to the projection apex 74 the minimum projection thickness 76 a can be from about 0 mm 0 in to about 0 5 mm 0 02 in for example about 0 25 mm 0 0098 in the maximum projection thickness 76 b can be from about 0 5 mm 0 02 in to about 2 mm 0 08 in for example about 1 mm 0 04 in the difference between the maximum projection thickness 76 b and the minimum projection thickness 76 b can be a maximum projection differential 78 the maximum projection differential 78 can be from about 0 mm 0 in to about 1 5 mm 0 059.