Long narrow tip overlays of contrasting material are eyecatching stuff of dreams. But you gotta remember the longer they get the more they are likely to be asked to bend ever so slightly. So, in effect, having more gluing surface is BAD. Very counterintuitive, and something I did not learn until I tried a three layer bone/horn/bone overlay that was almost 4 inches long.
Lemme just say it was dead sexy right up until I strung the bow and blew them both off. There went a good 7 hours of meticulous grinding, shaping, polishing, and unknown gallons of elbow grease!
Play around in the happy medium. An extra three of four grams of weight on the tips will not change a bow from a good shooter to a two legged half blind dog.