
Lengthening to specific mm/inch vertically without affecting the horizontal of an object
I have created these pieces for an interlocking adjustable frame (to be laser cut) and would like to lengthen the pieces without distorting the tabs/blanks (the connecting parts).
Specifically I need to control the length to specific mm/cm/inch measurements from A to B on both sides of the green piece (and subsequently E to F, E to G and H-J/H-I) to make longer pieces.
I have tried adding nodes, splitting, joining with new segments but I either distort or can't control total length from point to point (which I need to make for example a 10 x 10" or 8x6"frame.
Which action(s) do I need to execute to achieve this? Grateful for clear steps!