I've been crazy busy but finally read the last 20 pages of this thread. I see we're finally talking about Rosin! I've been pressing for 3+ years and I'm on my 5th generation press. I'd be happy to answer some info.
You can press trim but obviously the return isn't good, so you'd need to be press 7g+ pucks to get a decent yield. The result is very dark and contaminated, but hey it sure beats smoking trim! I personally do not press trim and instead just cook with it or extract it into capsules.
DO NOT buy that POS $70 one. That thing won't do shit (bad design for many reasons, not enough pressure, etc Look up the "Tarik" I think it's called, it was also a flop). You would be better off with a hair straightener and a 600lb hand clamp aka the HMK Press from HMK here on the boards. I have one made and don't use it, too bad we can't all know each other IRL or I'd hook it up rofl. SOON!
im glad you chimed in since you have been there done that and know what to look for.
no need to spend money if its not going to do the job.
peace