I was at Topper's yesterday and saw it. Very nicely done. The details make it stand out from the others. You hit the right proportions; ride height, tires, etc. The wife liked the job on the interior.
I had a similar set up with copper lines for the oil lines to and from the filter. I had double flared ends. Yours look similar. After about 100 miles the flare broke off the end. I have since put on steel lines. (brake lines) If you are not using flared ends or figured in the work hardening of the flares, disregard my comments. On mine, the return line viberates when it is running. The lines for the carbs could get kinda ugly if they crack off.
Neal