When I have taken connection in 2014 they installed 60 cms dish.I think if the satellite is more powerful dish size doesn’t matter.The US dth gaint Direct Tv is installing only 18 inch (45 cms )dishes
Still I never gone with TP CC. In our area I know minimum 5 local technicians. If you know anybody , you call them Bro. One thing, if you have time you remove your dish ownly. For re fitting, you call the technician. I told ₹400 for removing and re fitting as per my town.