I actually do send out for testing, and I buy from about 8 different suppliers. The purity numbers would indicate that most get them all from the same manufacturer, especially reta, but even tirz. I'm sure many of them use the same bottling companies as well, and just cheaper suppliers buy overruns and leftovers. I will say overall purity has been great, quantity has tightened up a lot in the last 18 months (which is good because sometimes I'd order 10mg and get 40mg labeled
T60 is in the same Orange cap too from what i read
complaint is the T30 and T60 having identical orange caps. They could easily be mixed up and I can see it causing some confusion for single vial end users. Other than that both tested perfectly.