Curious how well yours machines parts? Depth of cut?, speeds, etc... in hindsite would you have gone bigger blocks knowing you machines dovetails anyways? I have the room for 30’s on my 833t but the Y axis ends up a little more complicated. To prevent travel loss I would need to run rail extension supports off the base of the casting otherwise it’s doable. My casting is worn already less than two years so I don’t care what I machine off as long as nothing thins out. Thinking 15’s or 30’s would prevent rigidity loss from the dovetails. Curious to hear or see a video link of your machine running. Fortunately I have a 20x40 bed mill I can easily machine up base and column. The other thing is an aluminum saddle seems like it may not be as rigid and dampening as using a cast iron block. Already spending the money what’s $200 more?