Thanks Rolla, appreciate the help. The only one that I have found different is the sole plate. The one I have is red. Though it confirms your comment about Rover not being consistent. Must have used the cheapest available paint on that day.
Hi BB, I have a 14" SB with square bar holding the rubber blocks and I'm always losing them and is probably why they switched to bolts.
Thanks Deejay for confirming the roller. It's the only part that I have wondered why it's painted. I'm going to paint it as it was intended to be, but it's going to look ugly in a few months time. Though any other finish (galv or zinc) would only be more expensive for SB/Rover.