I’m looking for advice from the collective of seasoned welders we have here. I have a steel top from a roll cab and having replaced the toll cab I need to extend the top. it’s a mild steel sheet folded on all four sides. The front of the sheet has a few mends in it to create a ledge to stop tools falling off the worktop. I need to make the worktop 5” deeper (as in the front to back dimension). I’m wondering if I could cut it and weld a 5” deep length of steel in place. The top is 54” long with 1.5” downturns. Currently 1.5mm. Do you reckon I could weld this in really small sections to keep heat to a minimum or is this going to warp regardless and look rubbish? I’ve seen the guys on Project Binky effectively doing a series of tack welds to create a seam. Thoughts? If not welding my next option would be a plate hidden beneath and the whole thing riveted together with solid aluminium rivets. Ally and steel are likely to corrode over time. Not ideal. failing that, should I just buy a sheet of steel and make a new one from scratch?