I carried out this fix recently. I ordered the LEDs from rapid like in the guide but they were very bright and not the same colour.
In the end I replaced them with these https://www.ledperf.co.uk/led-dashboard-kit-for-skoda-octavia-2-1z-p-73.html (you can select just the white meter and instrument LEDs)
The colour is pretty accurate and they are still slightly brighter but definitely bearable.
Have plenty of flux on hand. Also, have some isopropyl alcohol to clean it up after ensuring you get rid of all little bits of loose solder in the unit. I missed some the first time I done it, this resulted in other dash warning lights flashing along with the indicator. I'm assuming some solder or flux was shorting out one of the pcb tracks. Once cleaned it all worked fine.