Dude, while his comment was uncalled for, you need to get off your high horse and learn the crafting system first. Blueprints are not mobs, they do not drop from specific other blueprints. Charged BP such as this ur125L are given out in lieu of a higher TT hof. Telling people to loot more of these means telling people to lose more money.
Not on a "high horse" bud. His comment was just ... as you said uncalled for, putting it nicely.
In terms of your comment regarding learning the crafting system, thank you I will take your kind words into consideration and continue to learn the crafting system to profit more. In fact, perhaps you should do the same? There is a lot about Entropia as a whole that stills needs to be figured out. For one not every blueprint drops these within the same +/-3 levels that you mentioned earlier. If that was the case then i should not have looted a UR200 L Blueprint from an Adapted Vivo T5 L Blueprint...one is level 1, the other level 5.
You do not get them in lieu of a hof either. I got my recent adapted Vivo 10 L BP on a standard low multiplier success, I was lucky enough to get it instead of an UL blueprint, it just only had a few clicks.
Your final comment on "Telling people to loot more of these means telling people to lose more money". I think you misunderstand Entropia in general. Most things that you do in Entropia is going to cost you money, in fact just getting a gun and shooting is generally going to cost you money. If it didn't, MA would be bankrupt...this game would not exist. When you go hunting, you go hunting for something that has MU. When you mine you look for ores/enmatter with MU. When you craft, you should also be looking at what has MU, not just what item you are crafting, but also what BP's you could get. Knowing there has been a confirmed drop of a high MU Blueprint on the BP you want to craft is part of it.
So despite your vast knowledge of the crafting system, I would rather go with what I have come across while actually crafting and learning the system, hence why my initial question of which BP it dropped from.
If the OP does not want to give up this information, then that is his/her right. It never hurts to ask, although it seems when you do everyone just turns against you for a simple question.
