digi-tails led tail light inserts

There's a lot of good info for the "do it yourselfers" to be found online. In most cases they make it look waaaay to simple and easy. For tiny surface mounted electrical components like LEDs... Those of you who are old enough will recall 8mm movie film and projectors. That is the same machinery and magazine design used where robotics are picking these tiny parts off the film and placing them in solder beds. Designing, programing and all the other aspects of that type product mfging isn't cheap.
To do it by hand, The flux brush, .125 diameter solder, and burns-o-matic torch you bought for plumbing repairs aint gonna work. LOL
I once took the face panel of my Kenwood stereo head unit apart and replaced the 1mm square blue LEDs with red ones. I proved to myself I could do it ( I already had every thing needed on hand ) but I wouldn't do it again for any amount of money. Granted these were some of the smallest LEDs available.
Not everyone has the dexterity of a surgeon. I certainly do not. So... If you think you have the skills and you're wiling to gather the proper materials, tools, and work station, go for it. If you're pretty sure you belong to the average joe class, don't waste your time and money. Save up and buy retail.