I think Boshman is your best bet, I've got a Tanaka k98 and one of the cheap china copies, but not sure if the cheap one is really the same as the marushin for take down.
I've stripped down both of mine, and always start at the front 
Can you post some pics as to where you are down to so far? It may help to remind me how you continue. IIRC there are some roll-pins which you have to push out then the barrel and hop unit push out straight downwards from the ABS "Arch"
“I wanted to come to the Volga at a specific location at a specific city. By chance it carries the name of Stalin himself. So don’t think I marched there for this reason – it could carry another name – but because there is a very important goal... this goal I wanted to take – and you know – we are very modest, we have it already."
Adolf Hitler, November 1942
"Comrades, Red Army men, commanders and political workers, men and women guerrillas! It is on your perseverance, staunchness, fighting skill and readiness to discharge your duty to the country that the defeat of the German-fascist army and the liberation of the Soviet land from the Hitlerite invaders depend! We can and must clear the Soviet land of Hitlerite vermin."
Joseph Stalin, November 1942
