Anyone using the BERG (IPI Industries) system on their EU2000i? These are the 'red cap' tops. I originally was going to use the silver finish machined caps that you see online, but i worry about crossthreading. I'm told the BERG cap, which is also machined is a much better fit maybe less risk of cross-threading. Also, does anyone know if it matters what size of fuel line is used with the extended tank set-up. Is there any reason why 3/8" fuel line would be to big/wide for the vaccum draw from the eu2000 pump? Should I use a smaller diameter line? Any other tips/suggestions in putting together this kit? Thanks.