I am also getting ready to remove my TC fuels tanks from the body (chassis is already removed). I'm fortunate to have a lift and spent time looking at all the possible ways to remove the fuel tanks, coming to the same conclusion that they would only come out the bottom.
Joji, I shuddered at your car on dolly platforms on the rear. VERY unsafe! Here is a suggestion: before I had a lift I had two sizes of jack stands, small for easy work (like brake jobs and tire changing) and large for getting under the car with a creeper. For the large jack stands I made wooden platforms that had sides glued and screwed in and rubber on the top. These were captured on the top of the jack stand by the size of the horizontal metal piece so the platform couldn't move. The whole idea of the platform was to spread the load on Lotus fiberglass bodies as well as provide a much more stable platform for being under the car. They worked so well, I made a set for my lift outrigger arms and use them all the time.