Finally worked up the nerve for this one. From camp at Upper Boy Scout Lake via the (awful) Rockwell Variation. E Ridge was as advertised - use trail with minimal exposure for the first portion followed by exposed slabby ledges on the N side before starting the steep climb up to the E summit. The slabby section was the crux for me - not so much climbing as sketchy walking. The rest was fun scrambling over very solid rock. Also did Tunnabora and Carillon. Tulainyo Lake is spectacular!