Dave is 100% spot on with his recommendation of how the WM Intruder should balance. I wound up pushing the cg back until the plane really didn't want to have the nose gear on the ground without fuel. I understand your conservative approach to maiden flight, but to really pull that last little bit of joy out of your point rolls, You'll want to take the cg back to at least where Dave recommends. You'll notice less pull to the canopy with the cg a bit further back and she will hang onto the knife edge position a little easier as well (although she really doesn't like flying knife edge for an extended distance). She will hang the points just fine for the brief amount of time you'll need for the point rolls, and she's a joy in the slow roll. The more rearward CG also seems to help the stall turn a bit as Dave mentioned.

For the price, WM has really given the modeler an excellent "old school" model to enjoy. Unless the Intruder is nose heavy, she's a piece of cake to land. A nose heavy intruder will land at about mach 2.2. Having the CG set so that the model barely wants to sit on all 3 wheels (without fuel) is a very comfortable flying airplane, especially in the landing. Start pushing the cg back from there and and you will want to exercise a little caution while setting up the landing to avoid getting too slow too soon, although she never seems to really get that "snap rolly" feeling. Go with Dave's recommended CG and I think you'll be amazed at just what a sweetheart this WM Intruder really is.