Vantec V4A-C7040 doesnt fit, should i mod or take fan off?

well the heatsink doesnt fit because it is basicaly a 70mmx70mm heatsink and my mobo has resistors standing in the way...

i could mod it but it would be quite hard since i dont have any tools and have to borrow and get time to do it

or i can take the special TMD fan off it
and try and put it onto my Globalwin CAK-38

the CAK-38 is 60x60
but the TMD is 70x70 so screwing it in isnt an option

i bought the V4A-7040 is because it is very efficient and quiet
i was planning to use it to replace this CAK-38 which has a loud and crazy delta fan...

so...
should i take the TMD fan off it and install it onto CAK-38's copper heatsink?
how should i do it?
use wires and tie it down?