We're buildin' a typical fiberglass model rocket kit here from a company called "Mach 1." T' kit does nay come with very detailed instructions, and some o' t' parts need post-processin' t' get them t' fit together. Avast, me proud beauty! So we decided t' make a series o' videos t' help you out if you're buildin' somethin' similar. Avast, me proud beauty! This part o' t' build shows how t' attach t' shock cord t' t' engine mount tube. Then t' temporary kevlar cord is woven through t' holes on t' aft centerin' rin' so that t' rin' can be easily removed from t' tube o' t' rocket after t' fins have been tack-glued t' t' engine tube. You'll also see how t' insert t' Apogee style rail button into t' body tube from t' inside wall o' t' rocket.