newr How to for S/L iMac flyback transformer replacement

Does any one know of a step by step instructions to replace the FlyBack Transformer on a newer iMac (slot loading 350MHz to DV 600MHz snow) the only thing I can find is that centuries old original.
I found a half dozen iMacs all of them need the FBT replaced otherwise I'll have some parts for sale on my local CL

thanks