I have a Senior Telemaster which has the firewall drilled for a different engine mount than what I will use. I am thinking about using 4 1/4 blind nuts and screws, mounted in the corners to hold an additional firewall in front of the existing one. I will then mount my engine mount to that one to facilitate changing engines and mounts easily. Will this cause any type of problem? It will be nice to be able to use it as a platform for checking out various engines. It has a chunk of steel for nose weight, so if I remove it I don't think the additional weight will cause any trouble.