Tell us about yourself!
You make good points. The KF1 and KF2 are lift configurations with KF1 a "double step" airofoil offering a "high lift" capability. I was thinking of the KF airofoil as it is very easy to construct compared to a Clark-Y airofoil (curved).
Why not look towards a "KF" airofoil?Much easier to create and gives excellent lift.
For thouse that want a truly indepth understanding of the various elements of RC Aircraft I can recommend taking a look at Dave Powers site at RCPOWERS.COMOne of the best, if not the best, on-line resources available!