Hi Renegade;
Using hte plant view you posted I made a couple of rough number and ASSUMING UNIFORM FOIL THICKNESS came that you could have a wing tip stall before root stall... a very undesirable situation. For this condition the right taper was 0.49; you see? you're not really far.
Just 1.5% more thickness gives you a near uniform stall; so you're on the safe field now... or you can keep the thickness uniform BUT necesarily you need to round the leading edge (OK; it's not convenient).
If you want to go deeper on that (I really don't think we need it anyway) you can download from the MIT site the AVL software for making some analysis... it's free!!!
Keep posting;

Guille