Off metal bashing - well getting ready to do so...
...bending metal - in particular bending thicker metal is a bit of a problem for DIY chaps. The under seat battery tray is about 16 gauge which in metric sizes is pretty close to 1.5mm thick. Even using softer and easier to bend Zincor galvanised plated steel, bending steel accurately and nicely isn't all that easy.
DIY bench bending brakes like this one are not up to the job - their limit is about 1 mm for steel =>
View attachment 115492
...an extra half a mm might not seem like much but think of it as a 50% increase in thickness - sure you can bend it a bit with this kind of thing but you'll end up killing it (before you've had some fun with some aluminium)
#####
I expected to have problems with the thicker battery tray steel so I took a gamble and bought a twenty quid vice mounted adapter from frosts.
Bargain for what it is. (And I think it is on sale at the moment for about 12 quid if I remember rightly)
View attachment 115493
Little magnets help hold the attachment onto the vice
View attachment 115494
It doesn't do a 4000 quid machine bend (as you might expect), but for twenty quid I'm really happy with it. If I need to get a tighter / sharper bend I reckon I can clamp the bend after using this adapter and hammer it flatter.
View attachment 115495
View attachment 115496
It does leave a bit of a mark on the outer surfaces - but Zincor marks easily so don't get too stressed!
View attachment 115497