▁with ▁the ▁idea ▁of ▁writing ▁a ▁song ▁about ▁each ▁member ▁of ▁the ▁band . ▁Having ▁a ▁concept ▁in ▁mind ▁was ▁a ▁good ▁starting ▁point ▁for ▁writing . ▁I ▁don ' t ▁know ▁why , ▁but ▁despite ▁the ▁impact ▁of ▁the ▁Who ' s ▁Tommy ▁and ▁Qu ad ro phen ia , ▁almost ▁over night ▁concept ▁albums ▁were ▁suddenly ▁perce ived ▁as ▁rather ▁na ff ▁and ▁pret ent ious ." ▁ ▁Before ▁emb ark ing ▁on ▁the ▁Oct opus ▁tour , ▁the ▁band ▁played ▁a ▁gru elling ▁set ▁of ▁dates ▁supporting ▁Black ▁S abb ath , ▁during ▁which ▁they ▁proved ▁to ▁be ▁very ▁un pop ular ▁with ▁the ▁majority ▁of ▁the ▁head lin ing ▁band ' s ▁fans . ▁D erek ▁Sh ul man ▁re called , ▁" It ▁was ▁perhaps ▁the ▁most ▁rid icul ous ▁pair ing ▁of ▁groups ▁ever ▁in ▁the ▁history ▁of ▁show ▁business . ▁For ▁the ▁most ▁part ▁we ▁got ▁bo o ed ▁off ▁the ▁stage ." ▁Following ▁the ▁tour , ▁Gent le ▁Gi ant ▁under w ent ▁their ▁most ▁significant ▁line - up ▁change ▁when ▁a ▁bur nt - out ▁and ▁disc ou rag ed ▁Phil ▁Sh ul man ▁left ▁the ▁band ▁following ▁disag re ements ▁with ▁his ▁brothers . ▁D erek ▁Sh ul man ▁took ▁over ▁all ▁lead ▁vocals ▁for ▁live ▁concert s , ▁becoming ▁Gent le ▁Gi ant ' s ▁de ▁fact o ▁lead ▁singer ▁( although ▁Ker ry ▁Min near ▁continued ▁to ▁sing ▁his ▁own ▁share ▁of ▁lead ▁vocals ▁on ▁records ). ▁ ▁Gary ▁Green ▁later