Hi Andy, me again,
I've never flown an Arrow myself but I wouldn't imagine you'll have any trouble with it.
Two things your checking instructor and you will have to agree that you've got covered are the making sure that you don't forget to operate the gear (and how to do it of course), and the emergency gear procedure.
Neither will be particularly onerous but you'll both need to be very sure that you're not going to miss the required check items and land gear up one day.
I would suggest that you read up how the gear works and the emergency procedures before you go - that should keep your circuit checkout time to a minimum.
From what I understand about the Arrow, you're going to be pretty disapointed with it's performance after the Dakota.