Can I just remove the pads and put TIM which is not conductive on the vram and the apply the stock backplate and then the coloer. Because the stock backplate colles the VRM better
As others have pointed out, the gaps are too big, you'll get worse performance. Not only that, with the heavy Accelero, your card will flex, causing even large gaps between backplate and mem/vrm chips.
I like the backplate idea though; I do the same with my cards.