That would have probably been the best way to go...... I didnt know they had an aftermarket variable temp sensor......
I had already set up the 2 fans independent of each other, on 2 sensors as well as AC taps the same way. For now, im going to try to stay with a sensor somewhere between the bottom of the radiator and the engine block.
I dont think the drain plug in the block is a good idea.
But thanks for your help.