I have looked at these Zeros, they don't seem to much different in size and weight than the Ace Simple Series. Like all the conversions I have done, it's an experiment. The first obstacle I noticed on that Zero is the front cowl, you won't have a 9x6 or even an 8x6 to get some air moving back with a 1/2A engine. You will have to put a 6 inch prop in front of the cowl and see if you get enough prop clearance to creat any valuable thrust. Just because of the front face alone you may need an .079-.10 size engine minimum just for the size of the prop needed. As for the weight, my .061 is flying a 1lb 5oz flying weight mini starjet, so your weight is not a problem.