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