R’ Chaim Oizer Gurvitz Shlit”a spoke in Gateshead Yeshiva last Friday night for 50 minutes about the Ma’alah of Limud BeIyun and how that is the Ikar Limud of Torah, and he had some very choshuve mareh mekomos!! (Gemoros, Rishonim, Chasasam Soifer, Gr”a, R’ Yerucham)
He said over that when he was in Brisk, he was one of 10 Bochurim selected to join a special va’ad from R’ Yoshe Ber zt”l, and the first four days he gave them over a Derech HaLimud he learnt from the Brisker Rav. The first thing he said was that “Learn Iyun all day – Morning, Afternoon, Night seder” – but “Learn a daf Gemara, Rashi, Tosfos every day Bein Hasdorim”!