One of the Australian pinball parts sellers told me that parts come from the same place so it doesn't matter where I buy them. I think it's important that people new to the hobby (like me) are aware that there can be a discernible difference in the quality.

I'm trained in law & economics so I'm no tech drawer but I've attached a pic of the top-view of the leg bracket from RTBB - this bolts straight onto my demo man without any modification. For reference the width of this bracket is approximately 70mm.

And just noting that the other seller did give me a full refund on my purchase as well as a few extra dollars for postage so that business has looked after me in that regards. However I won't be purchasing from that seller again.