Hi Stu
That was my original idea for opening the roof, ie hinge it, but, you have to remember that metal sheds get their strength once they are built. If you were to hinge the roof you'd need really reinforce the inner walls to support the pivot and although the roof is really light it's still necessary.
I framed my interior on all vertical and horizontal lines even for the drawer runner method.
As for condensation it's been really good, I've only noticed it a bit on the roof interior, on a very damp day, but that part I haven't insulated yet. The walls are perfectly drip free
I've lined the walls with double sided foil bubble and just haven't got around to doing the roof, but I've no reason to worry that the end result should be same as the walls.
It's also important to mount the shed on a concrete slab that's damp proofed above the running waterline.
Another thing to mention..
... While the foil insulation is great, it's also very good at reflecting EVERYTHING, your cam light, pc light, monitor etc. So..
Line your walls with that dull non reflective garden weed material, cheep and effective. 😊
Hope that helps in some way.
Thanks