has anyone managed to hook up a modern(ish) LCD display to a classic Mac in the way i described?

essentially, what i'm thinking is connecting up the video signal (J4 pin1) and ground to an RCA plug. connect to an LCD with RCA input, cross my fingers and hope the Magic Smoke doesn't escape.

other than that i don't have any idea what i'm doing, are there any warnings or tips you guys might have?