Non-parallel legs on cabinet face frame

[brbhan]

Detail: Oak Cabinet construction with oak face frame.
Face frame ¾” x 2 in wide x 34in. long legs are glued and biscuited at header 26in long.
Other end of legs’ opening turned out to be 7/8^th in less than at header.
Question: How do I compensate/stretch to get this opening to also be 26 in permanently, without cheating by trimming?

Yes, I should have installed a temporary brace at the end as a guide, before finishing the header side.

Please help!

[radhak]

We need a picture or diagram.

When you say 'header', is that the rail at the top of the face frame? (In any frame, the verticals are 'styles', the horizontals are 'rails')
I gather you have cut the bottom rail shorter than the top rail by 7/8"?

Or, did you mean that the cabinet (behind the face-frame) is already built with un-equal top/bottom part, and you realized it now when you are putting the face-frame on it?

[LCHIEN]

I'm picturing a face frame with legs like this:

And it sounds like you intended for A and B to be 26 inches but C came out 25-1/8"

So either A & B don't match or the pieces for D and E are bowed..

About the only way to fix it is to start over. If A&B are at fault, you can rip off the D&E pieces on the table saw and save them.