I finally made time to pull off the old bed and drill the holes in the new tile. I always hate to mess with the printer unless it is broken, but I had waited long enough to find out how well the tile would work.
I had read some things about mounting the bed on only three points instead of four and thought that made sense. So I designed & printed a mount to attach to the froglet on the 180° side.
I then removed the bed and springs.
I decided that I could gain some height by cutting off the screws on the y carriage.
After blocking all the electronics I cut one screw off. I then decided that the amount of metal debris created was risky and removed the carriage to cut the remaining screws.
After cutting the screws off I drilled holes to mount the new support.
I then marked the first two hole on the tile and drilled them (under water).
I then used the first two holes to locate the third
This last hole had a small amount of chip out on the top surface since I drilled it from the back. Most of this was removed when I drilled the countersink.
I then temporarily mounted the tile so I could mark and then drill the purge hole (at 0,0)
Finally, with the assistance of some tape, I mounted the bed using new springs.
I gained almost 12mm of height:
I am printing on it right now and it is working beautifully and is overall a very good success.
My only concerns are that the springs I am using are not quite as stiff as think I would like and I added some weight (about 13oz from where I was).