I've had a burner for a couple of years (got it from Andrew at Outdoor Code I think). Up until now I've used it with a clickstand and it's performed fine. I can't remember if the simmer ring came with the burner or I got it separately. Once hot it's great, but the stainless doesn't heat up as quickly as the brass of a trangia burner. Off the top of my head it's about 1cm taller than a trangia, but the same diameter. I remember the burner sat up a bit in the clickstand. So more fuel capacity.
That's interesting about SailGB Red. I ordered the stand from SailGB about 2 months ago and it came next day - couldn't fault the service. It all fits together well, but I haven't used it in anger yet. I got an 8 piece folding windshield from Ebay to complete the outfit.