Crimping does not make the wire stronger. Man oh man I cant understand what is so complicated about this concept. It simply gives many more directional faces of contact with the wax which makes it many times harder for the comb to pull off the wire. The only time I experienced pull through and comb damage was when I experimented with so called spider wire synthetic fishing line. Personally I dont think the extra grip given by the crimping is essential for most frame wiring but the ability of the crimping function to take up slack and evenly tension the strands makes the stringing and iniatil tensioning less critical. You can string so that the wire only only gives a dull thud when plucked, the side bars are not bowed etc., and after quickly zipping the wires with the crimper they will twang! The crimper serves two purposes.
Each zig in the wire is a miniature spring and can continue to take up slack as the sidebars yield over time to the tension of the wires.
Any kind of a half workable embedder needs a method to press the cross wires into the foundation. If you have vertical embedded wire foundation you have to put pressure between the vertical wires or your cross wires will be blowing in the wind and the bees will not properly incorporated. Pictured below is one I made up with a series of a dozen or so individual pressure fingers. The electrical contact points engage each cross wire run just inside the endbars. Unwired foundation sheets are easier to crosswire and embed than vertical wire foundation.
switch and pressure fingers.JPGembedder.JPG