Turn the flowmeter 90° anti-clockwise and have the gauges horizontal?
I'd do the same as wallace. What he means is turn the gauges horizontal then loosen the flowmeter and set it verticaly.
Flowmeter will still work even if it is 30 degrees off vertical.
it would be better to see the gauges and meter from the front.
Yes, that's what I was thinking of doing.Fabricate a short piece of tubing to fit between the regulator and the flow meter, bent at the correct angle and fitted with the correct unions if it's that critical.