The tube lines are murder to get off the control block. When i did mine, the engine was out, you could then remove the entire line to gain access. The bottom hose, you simply can't access when the motor is in, even when its out its next to impossible to get off with the tube lines in the way. When you pull the control block, ensure you replace this hose, with the bend, they crack and leak and its a lot of work to remove the control block again.
The absolute best way, is to remove the lines as you go with the engine out, but this is totally your choice.
I don't remember the drive motor hoses being in the way, but it was a long time ago that i did it. The problem is once removed you still have them attached to the pump, removing them from the pump is a HUGE job, things are in the way. Its easier to remove the entire pump! remove the hoses at the motors, so the 4 large hoses are still connected and remove the others at the pump. Lift the whole thing out.
It can be a big job, but if you do that, you can clean the machine well and even change the chain case oil while there.
All goes on how far you want to go.