You will be able see more of it on fridays in the morning times but at evening you only got 3 hrs
It's free on Friday evenings from 7-9. You won't get to see much, it's a very short window of time.
Check their website for free day/evenings admission. Usually they have PWYW on THU/FRI. Guided tours might be free during the week but you'll have to pay to get in.
Thanks! Your answer is awaiting moderation.