Well,Don Quinnel built me a Stenling out of a John Norrell Sten MK2.He welded up the cocking slot to Sterling specs.Did not ask him to do so thats the way it came back.Having said that the weapon was a disaster,cracked welds, unreliable, sent back 4 times,not to mention the self collapsing stock while firing!Stan Andrewski repaired the stock by welding up the tabs on the stock.Later on had John Andrewski do a complete rebuild and refinish ,Neither Stan or John had a "problem" working on my welded cocking slot stenling.Now 27,000 rnds later not a single stoppage using IMI 124 gr NATO ammo.If you want a Sterling have Don build you one then send to John for a complete rebuild.Andrewski will not build you one any more but he WILL rebuild your gun and it WILL be perfect.