Just want to ask around: besides BG66, which other 0.66mm strings have you tried? And how was the performance compared to BG66? For me, I have tried powergut 66, which is comparabe in terms of repulsion, but softer sound. also i tried to string with toalson 0.66mm strings (can't remember which model), but the toalson string broke when stringing. it can't go to 27lbs.