>>2938140
>The stock beam is 725mm long, and must accommodate all ambient temperatures from 20C to 70C
nah we're talking peek here, so try more like 140c

>>2938142
>You have introduced the consumer product requirement at a later point
well as he says, the original response was to me talking about mitigating thermal expansion in off-the-shelf aluminium extrusions, so it's pretty much implied that it can't be some big custom wire-edm'd flexure

>A flexure for each bolt. 1 DOF. Stiff otherwise
oh, for each bolt, earlier you said it was the entire extrusion that was a flexure
it's probably doable to make some sort of flexure t-nut assembly that you bolt a linear rail to, maybe even doable to ecm one at home for a voron-like diy project. would definitely be bulkier and less stiff than you'd want on the gantry, but for the rails going down the sides of the printer it could be plenty viable. im guessing a 20mm deep aluminium flexure, or maybe a 10mm deep steel flexure, thats 20x50mm or so, bolted in two places to the extrusion and to the rail in one place
picrel

>I have asked and implicitly asking about the fucking 500C oven several times by now
that was answered here >>2938033