I have this headset (I think a P3?) - it keeps coming a bit loose every couple of months, the shop I used to go to told me it was normal and I just had to get used to tightening it from time to time. Not super, unsafe loose, but enough you can feel "play" when you apply the front brake with any force...The shop guys told me I think that I could just tighten it using a spanner?
I see this old thread: Loosening Stronglight Headset
but cannot find the diagram it seems to reference...What are the tools/steps I need to take to tighten this headset?

The shop I used to go to went out of business and the place who helps me now didn't seem to know how to adjust it. They are trying to convince me to get rid of it for a campagnolo nuevo record (which would match other stuff on my bike but I also have a stronglight crank that this goes nicely with) I think I also saw online stronglight made an updated lock ring that used flats for a wrench instead of those pinholes - should I get that? Would it help with not having to tighten it up so often?