Hello fellow master modelers - I am going to hopefully take you through a pretty challenging scratch build of some 1/18 wheels and tires for a P-51 Mustang using primarily a Unimat mini-lathe.  At the time of this posting, I am not done, and there is some risk that it will be a failure.  But here goes.....   A few years ago I dove into a 21st Century Toys 1/18 scale P-51 Mustang, made extensive modifications and improvements, and called her Miss Velma.  Here is a picture of her after the two-y