Just make sure the Diamond you buy is NOT an old red label table. I had little experience on a Diamond when I moved down here a few years ago to SW Florida. The only decent room down here hs Diamonds and when I WENT THERE I hated the tables - pocket rejections and short banks and generally strange.
I since discovered that those tables were old red labels completely different than the newer blue label Diamonds- so go with a blue label- I would not trust a table top conversion. Also would not trust most table mechanics to convert a Brunswick GC to play like a Diamond- maybe some mechanics but not most.