Those wheels are sweet Paul.
As you say, Just need to lower it a tad - & watch out for those punctures at work.
This is the anti-puncture stuff that I used in the van and the Foz:
eBay Flat Free ClickyIf you have a puncture it will seal it and you need never worry about it again, does not harm the tyre and washes out of the tyre with water so totally safe.
You will need half of a bottle for each tyre.