I just bought a pre-built RV 8 and the first upgrade will be a new tailwheel to provide more ground clearance thus the question. I bought a Aviation products unit and they drill a pilot hole in the top which would require me to drill a hole vertically in the tail spring. The other option would be to carefully measure and drill two holes in the side of the tailwheel assembly sleeve and use the existing holes in the Van's tailwheel spring. Who has done which? Since I have not taken the spring off yet is is hollow or a solid spring steel rod? If solid drilling would be an issue and has anyone done it? I was not happy with the only 2 plus inch clearance of the standard tailwheel fork. Comments and or suggestions please as that is my hot project ( hot project and the weather in South Texas are mutually exclusive right now) Thanks Jack