How to Remove the Top of an Old Lange 6302a?

[BeachBumm]

I have a great Lange 630A in red porcelain that I've owned since about 1980.

The baffle is sagging and I want to replace it before the cold weather begins.
I don't really want to take it all apart - just remove the top.
Does anybody have experience in removing the top only?

I am guessing that I'd brace it on the inside with 2x4's left and right held with a
C clamp, and strap the upper outside snug. Remove the 2 screws and gently tap
the underside of the stovetop in an upward direction. Does that sound about right?

Any suggestions and advice is appreciated as I'd like to make this messy job as
easy as possible.

Thanks!