As suspected, it's not going to line up automatically with any of the templates that I've created because the drill pattern is different.
I've created a template for you though, it
should be accurate as I have not scaled anything from the EffectsLayout's pdf, but I cannot guarantee it will be. I've adjusted placement of the 18mm knob outlines for you as well as the drill/hole/hardware and template guides.
The actual template file is below called EffectsLayouts Lilliput 5 Knob 125b Template Reference. Once you download it, just remove the .jpg from the filename and it should open in Affinity Designer 2 for you. If that doesn't work for whatever reason, send me a private message and I'll find another way to get it over to you.
Edit: Just go ahead and send me a private message so we can figure out another way to get this file to you. I cannot upload the file to PedalPCB's forum because of the filename.
I hope this helps!
View attachment 111016View attachment 111017View attachment 111018