About to install new heatsink so to shim or not to shime? If so, copper or iodized?

If yo uhave shaky hands, or are clumsy SHIM.

If not and you are careful, not to shim.

I didn't get one, don't need it and gladly saved $5 not buying one.

Always get anodized because the original ones weren't and they can short circuit your cpu if not installed correctly. That is the only reason they anodized them.

what happens if the shim isn't manufactured right and its too thick? you fry your cpu.

if you ask me shim manufacturers are just trying to sell snake oil as gold

True.

I read an article looking at the pro's and con's of shims.

Basically they worked out, a shim is bad for heat distribution as it tends to spread heat to parts of the cpu that would normally be cooler (the copper conducts the heat across the whole cpu, parts which are not touching any part of the heat sink) and it is of no benefit to the user. Especially as you say, if it is not accurately made.

NOT TO SHIM!!!!!!!
I bought a cooper shim and put in on the CPU!
I get 5-7C more with the shim!!!!!!