S1283 problems ?

The bracket that you have selected is strong enough. Install the heatsink per supplied instructions. (Tighten screws gradually in a cross pattern, switching back and forth from screw to screw).

There will be no problem to the motherboard (curving, breaking, etc) with the installation of any after-market heatsink; even the heavier ones. Motherboards (and other circuit boards) are very strong.