Havin' some tools t' mark your body tubes will make designin' and buildin' your own rockets go a lot faster. T' standard tools that every designer should have are t' Estes Tube Markin' Guides. Well, blow me down! While they've been around for quite some time, they are still pretty effective. Well, blow me down! In this video, me bucko, you'll see a number o' ways t' use them t' build your own rockets.