gpardo
I put a part of the weight in front of the firewall and the other part around the front of the engine mount its work fine i used old spare parts of a real car i just went to a mechanical shop and pick up the parts

About the c.g yes at 135mm the plane still a little tail heavy but you can fly well iam flying my plane since november almost every weekend whitout an accident

Dogz
Yes itīs a nice looking plane in the air when your are turning and the sun goes over the wings the plane looks very nice

About the firewall yes you have to think a lot to put well to get a good fit of the cowl, take care of centering the cowl so when you put the spinner it keep aligned with the rounded side of the cowl i put my engine side mounted so i sanded a little the top of the engine mount to got proper fit of the cowl.