I missed those photos when you posted them mate
Certainly got a nice bit of penetration going on there & I must say, I do agree with your assesment of those inverters.
They do seem to have plenty of power in reserve for the heavier material .... I did slice open that bit of 5mm plate I used, a good 75-80% penetration, very good in view of the fact that I was not using that much power
Look forward to viewing the completed manifold mate
Been looking at that combined folder/roll/shear on the Northern Tools website, the current price is very good & I am growing ever more tempted
Could almost pay as much that for one of those lightweight Clarke angle iron type folders !!