Thanks for the responses everyone! After reading all your posts, I agree with the 3NT rebid more in retrospect. It seems to be the most consistent way of showing this kind of hand strength and long clubs as was mentioned. Yeah, the idea behind 4♣ was to convey strength, but it really doesn't leave responder with many options, so I forgive my partner for passing. Aside from that, the advantages of having a bidding system in place prior to the hand are clear especially with unusual hands like these. The problem is that I don't really have a single partner I play with all the time, like I said, I enjoy reading about Bridge but when I play it's usually a matter of opportunity. Anyway, thanks again to everyone for bearing with me. (I wasn't sure to what extent my self-analyses were correct, from a more advanced player's perspective).