I have also taken a look at your attachment, and the solutions offered.
1. 3D printed horns - flood the market
2. RRP - poison horns
3. Video camera in the horn
To be fair - all these ideas do have merit and are worth a try - in fact they are already tried and tested.
1. The 3D horn idea has been rejected - not by those who are in favour of lifting the trade ban, but by those trying to uphold the ban. Their logic is that the Copied horns will simply provide a smoke screen for genuine horn. There are a number of shortfalls - which have been addressed on Save The Rhinos webpage - some of which I agree with, but the reality is that the best chance of DNA copy horn working is if there is also a legal supply of genuine horn as well.
2. The horn dye and poison is nothing new. Its been tried tested, failed and now there are attempts to re-market it. The idea has merit, and does have an application, but its success is questionable. All the rhino in Tembe park and Ndumo park were treated with this product and there aren't many rhino left there. Problems are 1. Poison does not infuse properly into the horn, 2. The horn is invested in such diluted quantities that the poison effect will be so negligible 3. if there is an effect, then it will be attributed to the medicine working. 4. Assuming infusion does work - the lower section go the horn remain uninfused and it grows out. 5. Poachers are unlikely to care if the horn is infused or not. 6. All poisons have half lives, and decay with time. 7. The treatment procedure is lengthy and as a result rhino have to stay under for too long increasing the risk 8. Cutting the horn so is simple, visible and less danger to the rhino.
3. The video camera in the horn - lets face it. This one is ridiculous. Aside from the technical complexity of keeping contact and visual and video streaming the cameras are ineffective at night, or of the lens is dirty or damaged. Also imagine the battery you need to keep this thing transmitting 24 hours a day. My cell phone can't even last a day without a recharge, now imagine wifi, GPS and cellphone or satellite connection running all the time. The people who designed this think that a response team could reach the poachers in time - have no idea how ridiculous this is in a real bush environment. There are cases where the response teams hear the gunshot, and are unable to get to the source in time. Then lastly - if everything works well, - the lens is clean, the battery is charged, the system has connection, its daylight etc and the rhino is looking at the poacher at the time it is shot, How are you going to identify the poacher from the picture if he is 50 meters away? And how much does a poacher care if you have a photo of him or not. This device has clearly not been designed by someone who knows Africa.
So - while all these ideas and many many more are available and should be tested; there is no reason why they are exclusive of lifting the trade ban. In fact, as all these options are expensive, should they be of any use - then with a legal trade in place, rhino keepers will be able to decide for themselves what is the most efficient way yo protect their rhinos.