I've read alot just in this thread alone.about making the EZT hydro last longer by removing trans and changing the oil with 20W50 synthetic but no one has mentioned replaceing the filters or where they got one they are inside and is it worth it to mess with something thats suppose to be sealed agaist contamination.Just wondering Ive got the manual also while I'm reading might as well ask another question Ive read so much I thought it was old machinest that said he drilled and tapped a hole in bottom so he could drain without removing and do it every year at service time did I read that on here?