[morzh]

Took out the big can. Was able to do it fairly quick, now that I have all the tools.

Here's how I did it.

The initial lift is done using flush cutters. Depending on the position, various width tools could be used.
This is the cutter in the position. The idea is, the cutting surfaces get under the tab and then unbend it. The metal of the tool is pretty good, so I did not see any damage to the cutter itself.
Also, unlike a chiesel, it could be operated from the top, when there is little space to use a chiesel, which is long. On the other hand, the chiesel is useful where the cutter would have a handle too close to a chassis wall and could not be positioned well.
The more tools you have, the more flexible the choices are.

   

This is what flush cutter is:
   

And the surface of it is smooth. Unlike the regular cutter, the groove is inside  and the cutting surfaces are on the outside.
   

Then I proceed with a prying "lady's shoe" tool.
   

It brings it to this position
   

Then I proceed with regular pliers:
   
   

And straighten it out:
   


The big can is out:
   

The chassis is ready for cleaning, now that I have very few things left on it:
   


The can weighs at least 8lbs. Heavy.