A strut assembly to be used in conjunction with an embolic filtering device has varying strut thicknesses, with the thickness selected based at least in part on the flexing characteristics of the particular portion of the strut assembly. Mixtures of polypropylene and low density polyethylene are normally considered incompatible, but the contemplated blends which include 10-30% low-density polyethylene mixed with polypropylene give resin combinations runnable on a coater extruder and they produce a film having the advantages of polypropylene but which are no more difficult to glue than a film of low-density polyethylene. A removable base plate allows for a number of leg prostheses to be fabricated concurrently, using the same alignment apparatus. The error detection circuitry deems the error event to have occurred when three conditions are satisfied. In another example, location information about the intended recipient of a voicemail may be used by the caller to determine if the caller continues to desire to leave a voicemail.