Not sure what aluminums you are shooting but you are on to something that is worth expanding on.....HTM Rubber Blunts! Now, I shoot Ramin wood arrow shafts but have a ton of cedar AND aluminum that I also shoot and here is what I have taken to using with them. Aluminum: I take one of the smaller HTM Rubber Blunts, around 58 grains, and inside of that I make a threaded steel blunt by cutting down a field point (threaded) to a weight that when combined with the blunt I have the point weight I normally shoot. This way the aluminum shaft doesn't come through the bottom of the blunt. Blunts are much better than judo's in my experience for two reasons: (1) cedar breaks easily with a judo point when you hit something hard, even hard packed earth, (2) my heavy Ramin shafts simply destroy Judo points (the tips bend and the wire arms break off in time). On wood arrows I have taken to using the larger Rubber Blunts and have found them superior to using a steel blunt or a judo for many reasons and the main one being "SOUND" in the woods. If you like to stump shoot while out scouting or hunting anything metalic, even hitting a wood surface, is not a normal forest sound and for this reason I don't like using them. A rubber blunt however makes a very natural sound that is more like wood-on-soft wood contact and therefor doesn't project your presence like a metallic tip would. I have also found them excellant shooting in grass as they cannot snake under and get lost (at least as good if not better than a judo). So, your instinct to use the good ole Rubber Blunt is a good one and you should stick with it I think.