malecontrol- a few questions:
When you say you're sequencing traffic due you mean you are actually vectoring, and applying speed control to achieve separation minima for traffic in trail inbound for landing?
Also, can you confirm you have had no formal training on RADAR and have not acquired the relevant endorsement for the country you work in?
I only ask these questions because you knowledge of the principals or identifying traffic on RADAR seems to be minimal. For a trained RADAR controller what SPITOON and HD both say, not only makes perfect sense, but also isn't complicated. The principals of identifying a/c on RADAR is basic stuff covered at the very beginning of RADAR training.
If the answer to the above questions is YES than I can assure you what you are doing is illegal and extremely dangerous.