Best way to trim a too small wall oven opening

> If it were me I would trim it on a table saw.

Sorry if I wasn't clear. It's an existing (installed) cabinet that can't be disassembled based on how it's constructed. So it needs to be trimmed in place.

Hi there
I used to install kitchens and have had to do this many times.
Normally the oven trim extends past the opening about 2/8 to 1/2 inch so perfection is not critical.
A router would work if you can fasten or clamp a straight edge as a guide. If you decide to free hand with a router, be careful.
You could use a jigsaw, sawzaw or even a power saw. If you use power saw or jigsaw, apply masking or painters tape to plate surface to avoid scratching
Thanks
David

Thanks David. That helps. The cabinet extends out farther then the other cabinets. So I'm hoping that I can use the outside edges of the cabinet with the trim router's parallel edge guide. If not, clamping a straight edge is my backup plan. I would have to the same with a jigsaw since my freehand cuts are about as straight as a piece of wet spaghetti.

Given how little I have to take off, I think the router would be cleaner than the jigsaw. And it gives me the excuse I need to buy the trim router I've had my eye on for some time. My "main" router is a beast and I would not want to try to use it horizontally for this job.

Thanks again for the assistance.

Your welcome.
That is a very good reason to bur the router you have your eyes on.
Go for it
Thanks
David

Greetings from the future! If anyone else sees this in modern times, one of the best tools for in situ Cuts is an oscillating blade tool. Even an inexpensive one with a good blade will feel like a miracle the first time you use it.