ORIGINAL: spiral_72
As others have stated. Four ounces isn't a lot of weight. I put a 7oz camera on my 63" 40 sized trainer. It made no difference (to me) in how the plane flew. The weight might make a difference on a 3D plane in pulling vertical or not, but a trainer..... no sweat.
I agree i put a 7oz camera on a GWS slow stick and i think it flew better, and it's just a light stick and foam trainer.