Sorry, but I do not, The first time I saw one was on fred5876r's post above. I wasn't aware anybody other than TacSol made 2011-22 uppers/mags. I got the railed/threaded version. It fits well on several 1911 frames I have (kimber/RIA/etc). I bought it from Shooter's Connection and they shipped fast. Price wise it was a LOT more than the Nelson base unit, but at nearly $100 each, the mags are really making me not like it quite as much. As somebody mentioned in another thread, I tried GSG mags in a single-stack frame and they do not feed for this conversion.
So a quick comparison:
TacSol Threaded upper: $550
Nelson threaded upper: $450 + 129 for sight/rail combo = $579, for true apples/apples comparison.
Tacsol double-stack mag: $93
Nelson double-stack mag: $40
Tac Sol single-stack mag: $97
Nelson single stack mag $25
So you pay more for the Nelson up front, but you can recoup that on the back end in mags assuming you want more than one.
Anybody have any more input on the Nelson offering and mag compatability?
Thanks for the input, I suppose to throw another on in the mix:
Marvel Unit 1 Target with combo rail and threaded: $630
Wide stack magazine: $63
Single stack mag: $38
Thats why I was curious about the Nelson because Ive often heard the Marvel referred to as the gold standard for accuracy on these conversions. Another, even more interesting comparison, would be the Advantage Arms Target conversion. It looks like an identical design as the Marvel and tacsol units but much less expensive. Curious how it stacks up on accuracy/reliability.