Great going! It's actually very easy and quick to do something that helps the RC installation. I suggest making it with 0% infill or even just extrude a "bulb" through the nozzle with a nice sphere close to the top of the engine. This makes you able to fill it with weights to also check CG.
CAD artists lite above usually goes longer then needed making the printing harder. It's always a pro and con. Are you looking for a display model or installation help? The installation help really are a 5min job, say 10min including uploading to a server.