OK, I have now also measured it: I arrive at 61mm hole centre to hole centre. The 4 holes are perfectly arranged in a square with 61mm side length. Across the diagonal it's about 86.5 mm (measured).
I can measure this for you in about a week (I have the identical router, but am on holiday). ALTERNATIVE SUGGESTION: I bought a router lift for my router table that takes 69mm cutters and built it into the table. This gives you all the convenience (height adjustment from above, positioning pin etc.) and you are not tied to a specific drilling pattern (e.g. if you change the router bit) and with a few recessed T-tracks you can easily make an adjustable fence with suction. I bought the GD7 PRO Router Lift from ENJOYWOOD (I even have 2 of them, a 69mm in the stationary router table in the table of the table saw and a 65mm in a small portable router table that I put on the workbench when needed (has a small VEVOR router in it and is mostly used for rounding off or routing edges)). The router table is great, very stable, solid, precise metal construction and works perfectly. It doesn't cost too much either and is currently available on sale for just over 120 (instead of around 300 or so). I bought it from banggood (yes, a Chinese shop, but a lot of their woodworking tools are very good - but they're not cheap either, just very good value for money). If you do some googling, you will also find a lot of reviews about the milling lift (a very good review series for "China tools" is from Hooked on Wood (Youtube channel from Holland). Ah yes: you get a template for the milling cut-out in the table, into which the levelling mounting corners are then screwed, so that you can set the Fräslift plate absolutely flat to the table.
Rocksresort Laax: win a stay for 4 people
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