Hey MrMD,
If you are Vref+4kts, in nil wind conditions you would actually be Vaap-1kt. Bit hard to eye-ball 1kt but assuming you can, I guess that would be a tad bit on the unstabilized side.
If you wanted to bring the N1 up what you can do is just bring the thrust levers back just out of the CLB detent whilst disengaging the A/T. This will give a boost of power but just remember that the A/T is disengaged and if left at a high power setting, will cause your IAS to increase quite rapidly.
If you bring the thrust levers out of the CLB detent up closer to FLEX/MCT, the boost of power will be too much and the chances of high IAS is greater.
MAS