How is the durability and long term reliability of the DER EE DE-5000? It seems fairly popular. Thanks for posting this upgrade!
I'm thinking about picking one up.
Um, well, I bought the DER EE DE-5000 only because of the price.
Of course, when I hold them on the hand with Agilent/Keysight U173*C series, the U173*C felt much better equipment at the store in Akihabara.
However, I did not feel any guilty when I made the mod on the probe of the TL-21. That is the one of the benefit of cheaper goods.
By the way, if you buy DE-5000, it is good to do the CAL every time when you turn it on. It is a hassle, but it gives much reliable numbers.