Hi,
I replaced my cradle a few years ago.
Rear end up on axial stands.
Prop off
Slacken all 4 sub-frame bolts one at a time then screw back in 10 mm.
Lower sub-frame which will rest on original bolt heads.
Wedge tank UP with suitable wooden posts, against sub-frame/ chassis.
Remove all 4 bolts holding cradle in place.
Manoeuvre the cradle out.
I removed the old rusty support plates, and cleaned up the frame, had it powder coated. Bought some stainless steel sheet, used the old plates to make a paper pattern. Transferred the paper shapes to the stainless, cut out with saw and tin snips etc. Drilled / filed holes and even managed to form the 'ribs' using a 6" vice open 10mm and with a very blunt wide cold chisel carefully tapping along.
The 2 panels were then pop riveted back onto the cradle, a spray of wax, been good for 2 years now and still look ok.
(if you google Indian body car repairs you will find many examples of car repairs that they produce miracles with very basic tools).
Hope that helps.