Which way to go?

[Goulders]

May look into it then. I might be able to scrounge some hcl of a local brewer as I won't need much

Aye, that's an issue having to buy a litre, turning it into 2 litres and all you need is a few mls per brew.

Even more so with hydrochloric as it's most likely to be used for darker beers requiring a lesser reduction in alkalinity.
No commercial brewer I've asked has admitted to using hydrochloric acid.

The one I know does fortunately