This is actually a kitchen cabinet. The company I ordered it from messed up, so the oven I am installing inside the opening won't fit.
However, if I remove the TOP and BOTTOM panels (highlighted yellow) from the opening, the oven will fit!
My problem is the cabinet installation is already done, meaning, unlike my drawing below, I don't have access to the dowel tensioners and can't disassemble it without too much work involved; it's actually a middle cabinet with other cabinets beside it, so I have to disassemble the ENTIRE kitchen cabinetry in order to remove just those 2 panels.
The panels are attached to the sides with wood dowels and metal dowels with tensioners. Standard/typical stuff.
What I plan to do is HAND SAW the panels in the middle (dotted line), then pull them off, destroying them from the dowel joints.
I just don't know how to do it properly. I have a circular saw. I can probably adjust the cut depth to match the panel's thickness. However, it is too risky (to damage the panel below it), and I obviously can't use the circular saw for the top panel (not foolish enough to use a circular saw upside down).
I do have a 26" fine teeth (12 tpi) hand saw. I am planning to just use that.
Any other ideas that may be more efficient? I have a jigsaw, recip saw, and circular saw.