Took a quick look last night at changing the hydro oil in my model T Walker. This is the first time I have done it. How in the world do you get to the drain plugs!!!! I will take another look in better light today, but at first glance it looked about impossible without some major disassembly. If I can save some time by utilizing some tips from you all that have done this before, I would surely appreciate it... Thanks! Also, I am planning on using Mobil 1 as a replacement......what weight should be used.