Clarification on pneumatic flipper locking system

I'm after a bit of clarity in regards to how I can lock the flipper on Dantomkia. Historically, it's always been locked in the 'Up' position but this would involve touching the flipper arm in order to do so (duuuuuuh) but how the current rules are reading, this would no longer be allowed? I would still have to remove the lock bar to raise the arm in order for me to service the machine and re-lock the flipper upright anyway whilst work was being carried out internally.

Last thing I want to do is get to an event and be told it's unsafe so does the chassis need a bit of drilling in order for the flipper to be locked down or will I be alright with it being locked in the upright position