Have you seen this Doc? Link Seems like a reasonable price for a true MFT top if you are going to use Festool dogs and components.I think I see what you’re saying, but seems to me it would be better to have the hole centered exactly on a pegboard hole.
Thinking about it, the way to do it would be to install a 1/4” bit, turn the router upside down, drill a 1/4” hole in the accessory base, place on router base with the bit through a hole, and use double stick tape to attach to base. Drilling holes to match base would be a bit tricky. Then a piece of peg board and drill 4 dowel pin holes. This is basically what the Woodrave jig is. Unfortunately it’s no longer available. The advantage going you can create as big a template as you want, rather than be restricted like the Rockler, Domifix, etc.
What I don’t particularly like about the Rockler & Woodpecker is using a 1/2” bit + multiple passes & and having to run the collar around the circumference, as opposed to a single plunge cut with a 20mm or 3/4” bit.
When I do it, I think I’ll stick with the pegboard method and see how well it works.