IKEA Godmorgon Cabinet - How to combine and attach?

I still have a few questions about the procedure, which I currently find a bit more difficult:

We currently have 2 individual wall-mounted countertop washbasins.

Our already 2 individual pre-assembled Godmorgon vanity units are already standing underneath, open.

We would like a continuous approximately 160cm wide worktop above – which of course should then all be fixed to the wall and flush with the washbasins.

So:

1. Precise measuring of the cutout for the washbasins is important in order to cut the worktop accordingly (2 cutouts for the washbasins).

2. If the worktop is not fixed to the wall with brackets (which I actually don’t want to do, since I would like to screw the worktop only to the vanity units), how should I proceed best?

--> Mount the worktop directly on the washstand and lift everything flush with the washbasin, mark drill holes, and then fix it at the end? --> Sounds like a 4-person strength effort to me?

Certainly easier if the worktop is fixed to the wall with brackets and the individual vanity units are subsequently mounted to the wall (we don’t want to do that, since we have already drilled enough holes in porcelain stoneware… the fewer the better/easier)

Am I missing something here? How did you proceed here?

Why should the basin be cut out in the worktop at all, or why should this be done precisely? The washbasin "sits" on top of the worktop – so I basically only have to make sure that the siphon has enough space. > Ultimately, I don't actually have to set the washbasin into the worktop? Do I even need a cutout for the basins?

We have the same thing coming up soon, can you tell me where you bought the passage wooden board?
At Ikea, they only go up to 120cm. We also want a maximum of 2cm thickness/height.
Thanks!

We got the wood board from OBI.

I would recommend you just walk through the tabletops and see what you like (of course this works at all hardware stores – in your area?). Just have it cut to size (possibly also with a cutout – we did that too) and done.

PS: by the way, I’m super happy with the DIY construction using IKEA furniture. I would always do it that way again. Pricewise, definitely about 1/3 of a complete construction you would get from a specialist retailer.

What did you do with the cut edge? Just glued it (I’d be afraid that water might get in there) Can you take some photos of how it looks and how you did it? Thank you!!

Regarding the cut edge: simply iron on the matching edge banding here (if the hardware store sells you a table top, they usually also have the matching edge banding in stock). No water can penetrate there... These are the outer edges of the table top - you’re not going to pour a bucket of water over it anyway. Just make sure to rub the cut edge with silicone before ironing it on. Then water has no chance anyway.

You can do this without any worries. Everything will be sealed at the back with silicone joints anyway – also around the sink. I can gladly provide photos later – I don’t have any on my smartphone right now – I’ll take some if I remember this evening.

Regarding the procedure:

--> I connected the two pieces of furniture with furniture connecting screws so that you make one piece out of the two single units (60 cm or 80 cm – depending on what you have). If you want to hang the thing on the wall, this is absolutely necessary.

--> Then I put the table top on and screwed it to the corpus with brackets, so that from all the single parts you make one complete piece of furniture. When buying the table top, pay attention to the exact dimensions you want (consider side overhangs and to the front – depending on how many millimeters you want there).

--> After that, press the entire construction (you should be 2-3 people for this) under the sink and against the wall so that everything sits perfectly flush. Then simply mark the holes (we screwed on 4 brackets and it holds solidly) and then just drill – insert dowels – screw the brackets to the corpus and you’re done.

Photos afterwards would be great. Thanks for the description