RE: Where would I put my CG?
Cg will be where it's always sposed to be, on this sort of model 25~30% MAC. There is a calculator as a 'Sticky' on this forum somewhere, but if you use your drawing, measure 1/2 way out on the combined wing plan from the centre (treat the top and bottom wing as one with a straight trailing edge and swept leading edge) draw a line parallel to the fuse centre line from L/E to T/E and measure between a 1/4 and 1/3 back from the L/E, this point, when projected back to the centre will be pretty close.
Evan WB # 12.