The old thinset wont hurt anything.
Do you have to remove thinset for rubber flooring.
Regardless of the method used to remove the tile there will.
I found it was much more productive to cut through the grout lines first with an angle grinder and diamond blade.
If you are intent not to waste more time on the old floor and the amount of rocking is very slight use thinset to glue the tiles down.
Part of the problem you had was the blade you were given was for removing vinyl tile and adhesive.
Just finished removing tile and thin set from a small 5 x5 bathroom floor an hour ago.
I use a wide cold chisel and hammer to remove the tile.
You could use a circ.
There are a few main ways to safely remove thinset without damaging any surfaces and the best method for you to use will depend on what type of surface you used the thinset on.
Thinset is a portland cement product that dries very hard so it will support the tiles and resist cracking on a slight lump better than any premixed mastic tile adhesive or construction adhesive.
A thinset installation of tile can be one of the strongest installations possible which is a good thing until you try to take it up.
I m thinking about the future if i need to do what you did ripping out the old tile and then left with all that thinset on plywood.
Delicate surfaces like kitchen walls and wood floors will require using an angle grinder to gently scrape away the thinset.
Like the other guy said you must patch it smooth though so your tile sits flat while keep your slop to your flange for drainage to do this a 3 to 1 mudbed mix can be used but skimming patch would be easier very inportant thing is to waterproof your floor to the drain and go atleast half way up your wall so any leak you may get through grout will drain too.
Hopefully you have a moment to respond.
An air chisel with the correct blade would have made short work of it all and been much much cheaper than 500.
Today we learn how to take thinset off the floor with a nifty contraption i made.
Floor no more and how to mostly remove thinset from wood subfloors.
People who have renovated their home will know the struggle behind getting rid of the thinset thinset is cement based adhesive material which is used to set the tiles and floorings in their place.