Oil pressure sending unit again!!!

I guess this fits in both here and engines. Anyway, I put a new one on about forever ago. My guage was going crazy, the needle was jumping all over the place.The replacement worked for a few days and then, nothing. I bought a new one from a different parts store. It sat around for forever. Today I put it on with some help. I was kinda worried my guage was gone. I have a NOS one but wasn't looking to changing that out. Well I cranked it up and BAM!!! 40 psi...I guess I'll see how long this one will work. Now if I can fix my gas guage that easy I'll have everything working.