With reference to your email I have additional information and also a proposal, see below.
One of the welds was made on the Autoweld 813 & One weld was made on Autoweld1320; i.e. same weld result from both machines.
Welding this material is at the top of the range for a Autoweld 813 and bottom of the range for a Autoweld 1320 although 5 weld/day is not a great amount, for many years of use, we would recommend the AW1320 welder for the duty.
Note; the Autoweld 813 could be used for the duty but the welder may require an annual overhaul and the bearing bushes replaced.
In view of above comments we would therefore recommend the AW1320 and my proposal is that today I have been advised that our development department have released the AW1320 that has been using for testing purposes and therefore this unit is available for purchase. Please see details and conditions below