Puttin' together a high power rocket is actually easier than you might imagine. Begad! Blimey! In this fourth video, me bucko, you'll see how install rail buttons and t' Aeropack engine retainer. Aye aye! Blimey! We're tryin' somethin' different in this series o' videos. Ya scallywag! Blimey! I'm personally goin' t' move from bein' in front o' t' camera, t' bein' behind it. Begad! Blimey! T' construction o' t' rocket is bein' done by Erin Card, arrr, who works here at Apogee Components as web designer and customer service representative. Since we're video recordin' t' process o' makin' this kit, shiver me timbers, we're takin' a bit longer than normal. But that's cool. Every time you get t' see Erin, ya bilge rat, she's wearin' somethin' different.