Forward...
Rearward rake will increase weather helm, and forward rake will decrease it. I've been playing with forestay/backstay adjustment on my 25.5. I felt I had no feel in my tiller, so I loosened the forestay 2 turns, and tightened the backstay 2, giving the mast more rearward rake. Went sailing, and the difference was quite an increase in weather helm. I'm going to reverse that by one turn to ease it a bit. In your case try the reverse to reduce rearward rake, perhaps 2 turns, easing the backstay and tightening the forestay, go sail and see where your at. Adjust from there. I use a Loos gauge to check final tension. Good luck, Brad